diff --git a/src/gen-use-table.py b/src/gen-use-table.py
index 2afbc760e..ebfae6fab 100755
--- a/src/gen-use-table.py
+++ b/src/gen-use-table.py
@@ -197,7 +197,10 @@ def is_CONS_SUB(U, UISC, UGC):
 def is_CONS_WITH_STACKER(U, UISC, UGC):
 	return UISC == Consonant_With_Stacker
 def is_HALANT(U, UISC, UGC):
-	return UISC in [Virama, Invisible_Stacker]
+	return UISC in [Virama, Invisible_Stacker] and not is_HALANT_OR_VOWEL_MODIFIER(U, UISC, UGC)
+def is_HALANT_OR_VOWEL_MODIFIER(U, UISC, UGC):
+	# https://github.com/harfbuzz/harfbuzz/issues/1102
+	return U == 0x11046
 def is_HALANT_NUM(U, UISC, UGC):
 	return UISC == Number_Joiner
 def is_ZWNJ(U, UISC, UGC):
@@ -248,6 +251,7 @@ use_mapping = {
 	'SUB':	is_CONS_SUB,
 	'CS':	is_CONS_WITH_STACKER,
 	'H':	is_HALANT,
+	'HVM':	is_HALANT_OR_VOWEL_MODIFIER,
 	'HN':	is_HALANT_NUM,
 	'ZWNJ':	is_ZWNJ,
 	'ZWJ':	is_ZWJ,
@@ -295,6 +299,7 @@ use_positions = {
 		'Blw': [Bottom],
 	},
 	'H': None,
+	'HVM': None,
 	'B': None,
 	'FM': None,
 	'SUB': None,
diff --git a/src/hb-ot-shape-complex-use-machine.hh b/src/hb-ot-shape-complex-use-machine.hh
index e7caca5a1..c9410e4e5 100644
--- a/src/hb-ot-shape-complex-use-machine.hh
+++ b/src/hb-ot-shape-complex-use-machine.hh
@@ -36,227 +36,266 @@
 
 #line 38 "hb-ot-shape-complex-use-machine.hh"
 static const unsigned char _use_syllable_machine_trans_keys[] = {
-	12u, 12u, 1u, 15u, 1u, 1u, 12u, 12u, 0u, 43u, 21u, 21u, 8u, 39u, 8u, 39u, 
-	1u, 15u, 1u, 1u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 26u, 8u, 26u, 8u, 26u, 
-	8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 
-	8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 13u, 21u, 4u, 4u, 13u, 13u, 8u, 39u, 
-	8u, 39u, 8u, 39u, 8u, 39u, 8u, 26u, 8u, 26u, 8u, 26u, 8u, 39u, 8u, 39u, 
-	8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 8u, 39u, 
-	8u, 39u, 1u, 15u, 12u, 12u, 1u, 39u, 8u, 39u, 21u, 42u, 41u, 42u, 42u, 42u, 
-	1u, 5u, 0
+	12u, 44u, 1u, 15u, 1u, 1u, 12u, 44u, 0u, 44u, 21u, 21u, 8u, 44u, 8u, 44u,
+	1u, 15u, 1u, 1u, 8u, 44u, 8u, 44u, 8u, 39u, 8u, 26u, 8u, 26u, 8u, 26u,
+	8u, 39u, 8u, 39u, 8u, 39u, 8u, 44u, 8u, 44u, 8u, 44u, 8u, 44u, 8u, 44u,
+	8u, 44u, 8u, 44u, 8u, 44u, 1u, 39u, 8u, 44u, 13u, 21u, 4u, 4u, 13u, 13u,
+	8u, 44u, 8u, 44u, 8u, 44u, 8u, 39u, 8u, 26u, 8u, 26u, 8u, 26u, 8u, 39u,
+	8u, 39u, 8u, 39u, 8u, 44u, 8u, 44u, 8u, 44u, 8u, 44u, 8u, 44u, 8u, 44u,
+	8u, 44u, 8u, 44u, 1u, 39u, 1u, 15u, 12u, 44u, 1u, 44u, 8u, 44u, 21u, 42u,
+	41u, 42u, 42u, 42u, 1u, 5u, 0
 };
 
 static const char _use_syllable_machine_key_spans[] = {
-	1, 15, 1, 1, 44, 1, 32, 32, 
-	15, 1, 32, 32, 32, 19, 19, 19, 
-	32, 32, 32, 32, 32, 32, 32, 32, 
-	32, 32, 32, 32, 9, 1, 1, 32, 
-	32, 32, 32, 19, 19, 19, 32, 32, 
-	32, 32, 32, 32, 32, 32, 32, 32, 
-	32, 15, 1, 39, 32, 22, 2, 1, 
-	5
+	33, 15, 1, 33, 45, 1, 37, 37,
+	15, 1, 37, 37, 32, 19, 19, 19,
+	32, 32, 32, 37, 37, 37, 37, 37,
+	37, 37, 37, 39, 37, 9, 1, 1,
+	37, 37, 37, 32, 19, 19, 19, 32,
+	32, 32, 37, 37, 37, 37, 37, 37,
+	37, 37, 39, 15, 33, 44, 37, 22,
+	2, 1, 5
 };
 
 static const short _use_syllable_machine_index_offsets[] = {
-	0, 2, 18, 20, 22, 67, 69, 102, 
-	135, 151, 153, 186, 219, 252, 272, 292, 
-	312, 345, 378, 411, 444, 477, 510, 543, 
-	576, 609, 642, 675, 708, 718, 720, 722, 
-	755, 788, 821, 854, 874, 894, 914, 947, 
-	980, 1013, 1046, 1079, 1112, 1145, 1178, 1211, 
-	1244, 1277, 1293, 1295, 1335, 1368, 1391, 1394, 
-	1396
+	0, 34, 50, 52, 86, 132, 134, 172,
+	210, 226, 228, 266, 304, 337, 357, 377,
+	397, 430, 463, 496, 534, 572, 610, 648,
+	686, 724, 762, 800, 840, 878, 888, 890,
+	892, 930, 968, 1006, 1039, 1059, 1079, 1099,
+	1132, 1165, 1198, 1236, 1274, 1312, 1350, 1388,
+	1426, 1464, 1502, 1542, 1558, 1592, 1637, 1675,
+	1698, 1701, 1703
 };
 
 static const char _use_syllable_machine_indicies[] = {
+	1, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0,
 	1, 0, 3, 2, 2, 2, 2, 2, 
 	2, 2, 2, 2, 2, 2, 2, 2, 
-	4, 2, 3, 2, 6, 5, 7, 8, 
+	4, 2, 3, 2, 6, 5, 5, 5,
+	5, 5, 5, 5, 5, 5, 5, 5,
+	5, 5, 5, 5, 5, 5, 5, 5,
+	5, 5, 5, 5, 5, 5, 5, 5,
+	5, 5, 5, 5, 6, 5, 7, 8,
 	9, 7, 10, 8, 9, 9, 11, 9, 
 	9, 3, 12, 9, 9, 13, 7, 7, 
 	14, 15, 9, 9, 16, 17, 18, 19, 
 	20, 21, 22, 16, 23, 24, 25, 26, 
 	27, 28, 9, 29, 30, 31, 9, 9, 
-	9, 32, 9, 34, 33, 36, 35, 35, 
-	37, 1, 35, 35, 38, 35, 35, 35, 
-	35, 35, 39, 40, 41, 42, 43, 44, 
-	45, 46, 40, 47, 39, 48, 49, 50, 
-	51, 35, 52, 53, 54, 35, 36, 35, 
-	35, 37, 1, 35, 35, 38, 35, 35, 
-	35, 35, 35, 55, 40, 41, 42, 43, 
-	44, 45, 46, 40, 47, 48, 48, 49, 
-	50, 51, 35, 52, 53, 54, 35, 37, 
-	56, 56, 56, 56, 56, 56, 56, 56, 
-	56, 56, 56, 56, 56, 57, 56, 37, 
-	56, 36, 35, 35, 37, 1, 35, 35, 
-	38, 35, 35, 35, 35, 35, 35, 40, 
-	41, 42, 43, 44, 45, 46, 40, 47, 
-	48, 48, 49, 50, 51, 35, 52, 53, 
-	54, 35, 36, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	40, 41, 42, 43, 44, 35, 35, 35, 
-	35, 35, 35, 49, 50, 51, 35, 52, 
-	53, 54, 35, 36, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 41, 42, 43, 44, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	52, 53, 54, 35, 36, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 42, 43, 44, 35, 
-	36, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 43, 44, 35, 36, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 44, 35, 
-	36, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	42, 43, 44, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 52, 53, 54, 
-	35, 36, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 42, 43, 44, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 53, 
-	54, 35, 36, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 42, 43, 44, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 54, 35, 36, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 41, 42, 43, 44, 35, 35, 
-	35, 35, 35, 35, 49, 50, 51, 35, 
-	52, 53, 54, 35, 36, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 41, 42, 43, 44, 35, 
-	35, 35, 35, 35, 35, 35, 50, 51, 
-	35, 52, 53, 54, 35, 36, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 41, 42, 43, 44, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	51, 35, 52, 53, 54, 35, 36, 35, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 40, 41, 42, 43, 
-	44, 35, 46, 40, 35, 35, 35, 49, 
-	50, 51, 35, 52, 53, 54, 35, 36, 
-	35, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 40, 41, 42, 
-	43, 44, 35, 58, 40, 35, 35, 35, 
-	49, 50, 51, 35, 52, 53, 54, 35, 
-	36, 35, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 40, 41, 
-	42, 43, 44, 35, 35, 40, 35, 35, 
-	35, 49, 50, 51, 35, 52, 53, 54, 
-	35, 36, 35, 35, 35, 35, 35, 35, 
-	35, 35, 35, 35, 35, 35, 35, 40, 
-	41, 42, 43, 44, 45, 46, 40, 35, 
-	35, 35, 49, 50, 51, 35, 52, 53, 
-	54, 35, 36, 35, 35, 37, 1, 35, 
-	35, 38, 35, 35, 35, 35, 35, 35, 
-	40, 41, 42, 43, 44, 45, 46, 40, 
-	47, 35, 48, 49, 50, 51, 35, 52, 
-	53, 54, 35, 36, 35, 35, 37, 1, 
-	35, 35, 38, 35, 35, 35, 35, 35, 
-	35, 40, 41, 42, 43, 44, 45, 46, 
-	40, 47, 39, 48, 49, 50, 51, 35, 
-	52, 53, 54, 35, 60, 59, 59, 59, 
-	59, 59, 59, 59, 61, 59, 10, 62, 
-	60, 59, 11, 63, 63, 3, 6, 63, 
-	63, 64, 63, 63, 63, 63, 63, 65, 
+	9, 32, 33, 9, 35, 34, 37, 36,
+	36, 38, 1, 36, 36, 39, 36, 36,
+	36, 36, 36, 40, 41, 42, 43, 44,
+	45, 46, 47, 41, 48, 40, 49, 50,
+	51, 52, 36, 53, 54, 55, 36, 36,
+	36, 36, 56, 36, 37, 36, 36, 38,
+	1, 36, 36, 39, 36, 36, 36, 36,
+	36, 57, 41, 42, 43, 44, 45, 46,
+	47, 41, 48, 49, 49, 50, 51, 52,
+	36, 53, 54, 55, 36, 36, 36, 36,
+	56, 36, 38, 58, 58, 58, 58, 58,
+	58, 58, 58, 58, 58, 58, 58, 58,
+	59, 58, 38, 58, 37, 36, 36, 38,
+	1, 36, 36, 39, 36, 36, 36, 36,
+	36, 36, 41, 42, 43, 44, 45, 46,
+	47, 41, 48, 49, 49, 50, 51, 52,
+	36, 53, 54, 55, 36, 36, 36, 36,
+	56, 36, 37, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	41, 42, 43, 44, 45, 36, 36, 36,
+	36, 36, 36, 50, 51, 52, 36, 53,
+	54, 55, 36, 36, 36, 36, 42, 36,
+	37, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 42,
+	43, 44, 45, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 53, 54, 55,
+	36, 37, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 43, 44, 45, 36, 37, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 44, 45,
+	36, 37, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 45, 36, 37, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 43, 44, 45,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 53, 54, 55, 36, 37, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 43, 44,
+	45, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 54, 55, 36, 37,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 43,
+	44, 45, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 55, 36,
+	37, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 42,
+	43, 44, 45, 36, 36, 36, 36, 36,
+	36, 50, 51, 52, 36, 53, 54, 55,
+	36, 36, 36, 36, 42, 36, 37, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 42, 43, 44,
+	45, 36, 36, 36, 36, 36, 36, 36,
+	51, 52, 36, 53, 54, 55, 36, 36,
+	36, 36, 42, 36, 37, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 42, 43, 44, 45, 36,
+	36, 36, 36, 36, 36, 36, 36, 52,
+	36, 53, 54, 55, 36, 36, 36, 36,
+	42, 36, 37, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	41, 42, 43, 44, 45, 36, 47, 41,
+	36, 36, 36, 50, 51, 52, 36, 53,
+	54, 55, 36, 36, 36, 36, 42, 36,
+	37, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 41, 42,
+	43, 44, 45, 36, 60, 41, 36, 36,
+	36, 50, 51, 52, 36, 53, 54, 55,
+	36, 36, 36, 36, 42, 36, 37, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 36, 36, 41, 42, 43, 44,
+	45, 36, 36, 41, 36, 36, 36, 50,
+	51, 52, 36, 53, 54, 55, 36, 36,
+	36, 36, 42, 36, 37, 36, 36, 36,
+	36, 36, 36, 36, 36, 36, 36, 36,
+	36, 36, 41, 42, 43, 44, 45, 46,
+	47, 41, 36, 36, 36, 50, 51, 52,
+	36, 53, 54, 55, 36, 36, 36, 36,
+	42, 36, 37, 36, 36, 38, 1, 36,
+	36, 39, 36, 36, 36, 36, 36, 36,
+	41, 42, 43, 44, 45, 46, 47, 41,
+	48, 36, 49, 50, 51, 52, 36, 53,
+	54, 55, 36, 36, 36, 36, 56, 36,
+	38, 58, 58, 58, 58, 58, 58, 37,
+	58, 58, 58, 58, 58, 58, 59, 58,
+	58, 58, 58, 58, 58, 58, 42, 43,
+	44, 45, 58, 58, 58, 58, 58, 58,
+	58, 58, 58, 58, 53, 54, 55, 58,
+	37, 36, 36, 38, 1, 36, 36, 39,
+	36, 36, 36, 36, 36, 36, 41, 42,
+	43, 44, 45, 46, 47, 41, 48, 40,
+	49, 50, 51, 52, 36, 53, 54, 55,
+	36, 36, 36, 36, 56, 36, 62, 61,
+	61, 61, 61, 61, 61, 61, 63, 61,
+	10, 64, 62, 61, 11, 65, 65, 3,
+	6, 65, 65, 66, 65, 65, 65, 65,
+	65, 67, 16, 17, 18, 19, 20, 21,
+	22, 16, 23, 25, 25, 26, 27, 28,
+	65, 29, 30, 31, 65, 65, 65, 65,
+	33, 65, 11, 65, 65, 3, 6, 65,
+	65, 66, 65, 65, 65, 65, 65, 65,
 	16, 17, 18, 19, 20, 21, 22, 16, 
-	23, 25, 25, 26, 27, 28, 63, 29, 
-	30, 31, 63, 11, 63, 63, 3, 6, 
-	63, 63, 64, 63, 63, 63, 63, 63, 
-	63, 16, 17, 18, 19, 20, 21, 22, 
-	16, 23, 25, 25, 26, 27, 28, 63, 
-	29, 30, 31, 63, 11, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 16, 17, 18, 19, 20, 63, 
-	63, 63, 63, 63, 63, 26, 27, 28, 
-	63, 29, 30, 31, 63, 11, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 17, 18, 19, 20, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 29, 30, 31, 63, 11, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 18, 19, 
-	20, 63, 11, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 19, 20, 63, 11, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	20, 63, 11, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 18, 19, 20, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 29, 
-	30, 31, 63, 11, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 18, 19, 20, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 30, 31, 63, 11, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 18, 19, 20, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 31, 63, 11, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 17, 18, 19, 20, 
-	63, 63, 63, 63, 63, 63, 26, 27, 
-	28, 63, 29, 30, 31, 63, 11, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 17, 18, 19, 
-	20, 63, 63, 63, 63, 63, 63, 63, 
-	27, 28, 63, 29, 30, 31, 63, 11, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 17, 18, 
-	19, 20, 63, 63, 63, 63, 63, 63, 
-	63, 63, 28, 63, 29, 30, 31, 63, 
-	11, 63, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 16, 17, 
-	18, 19, 20, 63, 22, 16, 63, 63, 
-	63, 26, 27, 28, 63, 29, 30, 31, 
-	63, 11, 63, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 16, 
-	17, 18, 19, 20, 63, 66, 16, 63, 
-	63, 63, 26, 27, 28, 63, 29, 30, 
-	31, 63, 11, 63, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	16, 17, 18, 19, 20, 63, 63, 16, 
-	63, 63, 63, 26, 27, 28, 63, 29, 
-	30, 31, 63, 11, 63, 63, 63, 63, 
-	63, 63, 63, 63, 63, 63, 63, 63, 
-	63, 16, 17, 18, 19, 20, 21, 22, 
-	16, 63, 63, 63, 26, 27, 28, 63, 
-	29, 30, 31, 63, 11, 63, 63, 3, 
-	6, 63, 63, 64, 63, 63, 63, 63, 
-	63, 63, 16, 17, 18, 19, 20, 21, 
-	22, 16, 23, 63, 25, 26, 27, 28, 
-	63, 29, 30, 31, 63, 3, 67, 67, 
-	67, 67, 67, 67, 67, 67, 67, 67, 
-	67, 67, 67, 4, 67, 6, 67, 8, 
-	63, 63, 63, 8, 63, 63, 11, 63, 
-	63, 3, 6, 63, 63, 64, 63, 63, 
-	63, 63, 63, 63, 16, 17, 18, 19, 
-	20, 21, 22, 16, 23, 24, 25, 26, 
-	27, 28, 63, 29, 30, 31, 63, 11, 
-	63, 63, 3, 6, 63, 63, 64, 63, 
-	63, 63, 63, 63, 63, 16, 17, 18, 
+	23, 25, 25, 26, 27, 28, 65, 29,
+	30, 31, 65, 65, 65, 65, 33, 65,
+	11, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 16, 17,
+	18, 19, 20, 65, 65, 65, 65, 65,
+	65, 26, 27, 28, 65, 29, 30, 31,
+	65, 65, 65, 65, 17, 65, 11, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 17, 18, 19,
+	20, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 29, 30, 31, 65, 11,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 18,
+	19, 20, 65, 11, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 19, 20, 65, 11,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 20, 65, 11, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 18, 19, 20, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	29, 30, 31, 65, 11, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 18, 19, 20, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 30, 31, 65, 11, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 18, 19, 20,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 31, 65, 11, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 17, 18, 19,
+	20, 65, 65, 65, 65, 65, 65, 26,
+	27, 28, 65, 29, 30, 31, 65, 65,
+	65, 65, 17, 65, 11, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 17, 18, 19, 20, 65,
+	65, 65, 65, 65, 65, 65, 27, 28,
+	65, 29, 30, 31, 65, 65, 65, 65,
+	17, 65, 11, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 17, 18, 19, 20, 65, 65, 65,
+	65, 65, 65, 65, 65, 28, 65, 29,
+	30, 31, 65, 65, 65, 65, 17, 65,
+	11, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 16, 17,
+	18, 19, 20, 65, 22, 16, 65, 65,
+	65, 26, 27, 28, 65, 29, 30, 31,
+	65, 65, 65, 65, 17, 65, 11, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 16, 17, 18, 19,
+	20, 65, 68, 16, 65, 65, 65, 26,
+	27, 28, 65, 29, 30, 31, 65, 65,
+	65, 65, 17, 65, 11, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 16, 17, 18, 19, 20, 65,
+	65, 16, 65, 65, 65, 26, 27, 28,
+	65, 29, 30, 31, 65, 65, 65, 65,
+	17, 65, 11, 65, 65, 65, 65, 65,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	16, 17, 18, 19, 20, 21, 22, 16,
+	65, 65, 65, 26, 27, 28, 65, 29,
+	30, 31, 65, 65, 65, 65, 17, 65,
+	11, 65, 65, 3, 6, 65, 65, 66,
+	65, 65, 65, 65, 65, 65, 16, 17,
+	18, 19, 20, 21, 22, 16, 23, 65,
+	25, 26, 27, 28, 65, 29, 30, 31,
+	65, 65, 65, 65, 33, 65, 3, 65,
+	65, 65, 65, 65, 65, 11, 65, 65,
+	65, 65, 65, 65, 4, 65, 65, 65,
+	65, 65, 65, 65, 17, 18, 19, 20,
+	65, 65, 65, 65, 65, 65, 65, 65,
+	65, 65, 29, 30, 31, 65, 3, 69,
+	69, 69, 69, 69, 69, 69, 69, 69,
+	69, 69, 69, 69, 4, 69, 6, 69,
+	69, 69, 69, 69, 69, 69, 69, 69,
+	69, 69, 69, 69, 69, 69, 69, 69,
+	69, 69, 69, 69, 69, 69, 69, 69,
+	69, 69, 69, 69, 69, 69, 6, 69,
+	8, 65, 65, 65, 8, 65, 65, 11,
+	65, 65, 3, 6, 65, 65, 66, 65,
+	65, 65, 65, 65, 65, 16, 17, 18,
 	19, 20, 21, 22, 16, 23, 24, 25, 
-	26, 27, 28, 63, 29, 30, 31, 63, 
-	69, 68, 68, 68, 68, 68, 68, 68, 
-	68, 68, 68, 68, 68, 68, 68, 68, 
-	68, 68, 68, 68, 69, 70, 68, 69, 
-	70, 68, 70, 68, 8, 67, 67, 67, 
-	8, 67, 0
+	26, 27, 28, 65, 29, 30, 31, 65,
+	65, 65, 65, 33, 65, 11, 65, 65,
+	3, 6, 65, 65, 66, 65, 65, 65,
+	65, 65, 65, 16, 17, 18, 19, 20,
+	21, 22, 16, 23, 24, 25, 26, 27,
+	28, 65, 29, 30, 31, 65, 65, 65,
+	65, 33, 65, 71, 70, 70, 70, 70,
+	70, 70, 70, 70, 70, 70, 70, 70,
+	70, 70, 70, 70, 70, 70, 70, 71,
+	72, 70, 71, 72, 70, 72, 70, 8,
+	69, 69, 69, 8, 69, 0
 };
 
 static const char _use_syllable_machine_trans_targs[] = {
-	4, 8, 4, 31, 2, 4, 1, 5, 
-	6, 4, 28, 4, 49, 50, 51, 53, 
-	33, 34, 35, 36, 37, 44, 45, 47, 
-	52, 48, 41, 42, 43, 38, 39, 40, 
-	56, 4, 4, 4, 4, 7, 0, 27, 
-	11, 12, 13, 14, 15, 22, 23, 25, 
-	26, 19, 20, 21, 16, 17, 18, 10, 
-	4, 9, 24, 4, 29, 30, 4, 4, 
-	3, 32, 46, 4, 4, 54, 55
+	4, 8, 4, 32, 2, 4, 1, 5,
+	6, 4, 29, 4, 51, 52, 53, 55,
+	34, 35, 36, 37, 38, 45, 46, 48,
+	54, 49, 42, 43, 44, 39, 40, 41,
+	58, 50, 4, 4, 4, 4, 7, 0,
+	28, 11, 12, 13, 14, 15, 22, 23,
+	25, 26, 19, 20, 21, 16, 17, 18,
+	27, 10, 4, 9, 24, 4, 30, 31,
+	4, 4, 3, 33, 47, 4, 4, 56,
+	57
 };
 
 static const char _use_syllable_machine_trans_actions[] = {
@@ -264,11 +303,12 @@ static const char _use_syllable_machine_trans_actions[] = {
 	7, 8, 0, 9, 10, 10, 3, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	3, 3, 0, 0, 0, 0, 0, 0, 
-	0, 11, 12, 13, 14, 7, 0, 7, 
-	0, 0, 0, 0, 0, 0, 0, 0, 
-	7, 0, 0, 0, 0, 0, 0, 7, 
-	15, 0, 0, 16, 0, 0, 17, 18, 
-	0, 3, 0, 19, 20, 0, 0
+	0, 3, 11, 12, 13, 14, 7, 0,
+	7, 0, 0, 0, 0, 0, 0, 0,
+	0, 7, 0, 0, 0, 0, 0, 0,
+	0, 7, 15, 0, 0, 16, 0, 0,
+	17, 18, 0, 3, 0, 19, 20, 0,
+	0
 };
 
 static const char _use_syllable_machine_to_state_actions[] = {
@@ -279,7 +319,7 @@ static const char _use_syllable_machine_to_state_actions[] = {
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
-	0
+	0, 0, 0
 };
 
 static const char _use_syllable_machine_from_state_actions[] = {
@@ -290,18 +330,18 @@ static const char _use_syllable_machine_from_state_actions[] = {
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
-	0
+	0, 0, 0
 };
 
 static const short _use_syllable_machine_eof_trans[] = {
-	1, 3, 3, 6, 0, 34, 36, 36, 
-	57, 57, 36, 36, 36, 36, 36, 36, 
-	36, 36, 36, 36, 36, 36, 36, 36, 
-	36, 36, 36, 36, 60, 63, 60, 64, 
-	64, 64, 64, 64, 64, 64, 64, 64, 
-	64, 64, 64, 64, 64, 64, 64, 64, 
-	64, 68, 68, 64, 64, 69, 69, 69, 
-	68
+	1, 3, 3, 6, 0, 35, 37, 37,
+	59, 59, 37, 37, 37, 37, 37, 37,
+	37, 37, 37, 37, 37, 37, 37, 37,
+	37, 37, 37, 59, 37, 62, 65, 62,
+	66, 66, 66, 66, 66, 66, 66, 66,
+	66, 66, 66, 66, 66, 66, 66, 66,
+	66, 66, 66, 70, 70, 66, 66, 71,
+	71, 71, 70
 };
 
 static const int use_syllable_machine_start = 4;
@@ -315,7 +355,7 @@ static const int use_syllable_machine_en_main = 4;
 
 
 
-#line 140 "hb-ot-shape-complex-use-machine.rl"
+#line 143 "hb-ot-shape-complex-use-machine.rl"
 
 
 #define found_syllable(syllable_type) \
@@ -334,7 +374,7 @@ find_syllables (hb_buffer_t *buffer)
   int cs;
   hb_glyph_info_t *info = buffer->info;
   
-#line 338 "hb-ot-shape-complex-use-machine.hh"
+#line 378 "hb-ot-shape-complex-use-machine.hh"
 	{
 	cs = use_syllable_machine_start;
 	ts = 0;
@@ -342,7 +382,7 @@ find_syllables (hb_buffer_t *buffer)
 	act = 0;
 	}
 
-#line 160 "hb-ot-shape-complex-use-machine.rl"
+#line 163 "hb-ot-shape-complex-use-machine.rl"
 
 
   p = 0;
@@ -350,7 +390,7 @@ find_syllables (hb_buffer_t *buffer)
 
   unsigned int syllable_serial = 1;
   
-#line 354 "hb-ot-shape-complex-use-machine.hh"
+#line 394 "hb-ot-shape-complex-use-machine.hh"
 	{
 	int _slen;
 	int _trans;
@@ -364,7 +404,7 @@ _resume:
 #line 1 "NONE"
 	{ts = p;}
 	break;
-#line 368 "hb-ot-shape-complex-use-machine.hh"
+#line 408 "hb-ot-shape-complex-use-machine.hh"
 	}
 
 	_keys = _use_syllable_machine_trans_keys + (cs<<1);
@@ -387,59 +427,59 @@ _eof_trans:
 	{te = p+1;}
 	break;
 	case 12:
-#line 129 "hb-ot-shape-complex-use-machine.rl"
+#line 132 "hb-ot-shape-complex-use-machine.rl"
 	{te = p+1;{ found_syllable (independent_cluster); }}
 	break;
 	case 14:
-#line 131 "hb-ot-shape-complex-use-machine.rl"
+#line 134 "hb-ot-shape-complex-use-machine.rl"
 	{te = p+1;{ found_syllable (standard_cluster); }}
 	break;
 	case 9:
-#line 135 "hb-ot-shape-complex-use-machine.rl"
+#line 138 "hb-ot-shape-complex-use-machine.rl"
 	{te = p+1;{ found_syllable (broken_cluster); }}
 	break;
 	case 8:
-#line 136 "hb-ot-shape-complex-use-machine.rl"
+#line 139 "hb-ot-shape-complex-use-machine.rl"
 	{te = p+1;{ found_syllable (non_cluster); }}
 	break;
 	case 11:
-#line 129 "hb-ot-shape-complex-use-machine.rl"
+#line 132 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (independent_cluster); }}
 	break;
 	case 15:
-#line 130 "hb-ot-shape-complex-use-machine.rl"
+#line 133 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (virama_terminated_cluster); }}
 	break;
 	case 13:
-#line 131 "hb-ot-shape-complex-use-machine.rl"
+#line 134 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (standard_cluster); }}
 	break;
 	case 17:
-#line 132 "hb-ot-shape-complex-use-machine.rl"
+#line 135 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (number_joiner_terminated_cluster); }}
 	break;
 	case 16:
-#line 133 "hb-ot-shape-complex-use-machine.rl"
+#line 136 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (numeral_cluster); }}
 	break;
 	case 20:
-#line 134 "hb-ot-shape-complex-use-machine.rl"
+#line 137 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (symbol_cluster); }}
 	break;
 	case 18:
-#line 135 "hb-ot-shape-complex-use-machine.rl"
+#line 138 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (broken_cluster); }}
 	break;
 	case 19:
-#line 136 "hb-ot-shape-complex-use-machine.rl"
+#line 139 "hb-ot-shape-complex-use-machine.rl"
 	{te = p;p--;{ found_syllable (non_cluster); }}
 	break;
 	case 1:
-#line 131 "hb-ot-shape-complex-use-machine.rl"
+#line 134 "hb-ot-shape-complex-use-machine.rl"
 	{{p = ((te))-1;}{ found_syllable (standard_cluster); }}
 	break;
 	case 4:
-#line 135 "hb-ot-shape-complex-use-machine.rl"
+#line 138 "hb-ot-shape-complex-use-machine.rl"
 	{{p = ((te))-1;}{ found_syllable (broken_cluster); }}
 	break;
 	case 2:
@@ -457,16 +497,16 @@ _eof_trans:
 	case 3:
 #line 1 "NONE"
 	{te = p+1;}
-#line 135 "hb-ot-shape-complex-use-machine.rl"
+#line 138 "hb-ot-shape-complex-use-machine.rl"
 	{act = 7;}
 	break;
 	case 10:
 #line 1 "NONE"
 	{te = p+1;}
-#line 136 "hb-ot-shape-complex-use-machine.rl"
+#line 139 "hb-ot-shape-complex-use-machine.rl"
 	{act = 8;}
 	break;
-#line 470 "hb-ot-shape-complex-use-machine.hh"
+#line 510 "hb-ot-shape-complex-use-machine.hh"
 	}
 
 _again:
@@ -475,7 +515,7 @@ _again:
 #line 1 "NONE"
 	{ts = 0;}
 	break;
-#line 479 "hb-ot-shape-complex-use-machine.hh"
+#line 519 "hb-ot-shape-complex-use-machine.hh"
 	}
 
 	if ( ++p != pe )
@@ -491,7 +531,7 @@ _again:
 
 	}
 
-#line 168 "hb-ot-shape-complex-use-machine.rl"
+#line 171 "hb-ot-shape-complex-use-machine.rl"
 
 }
 
diff --git a/src/hb-ot-shape-complex-use-machine.rl b/src/hb-ot-shape-complex-use-machine.rl
index ddbeef6c3..7702cd94d 100644
--- a/src/hb-ot-shape-complex-use-machine.rl
+++ b/src/hb-ot-shape-complex-use-machine.rl
@@ -88,13 +88,16 @@ SMAbv	= 41; # SYM_MOD_ABOVE
 SMBlw	= 42; # SYM_MOD_BELOW
 CS	= 43; # CONS_WITH_STACKER
 
+HVM	= 44; # HALANT_OR_VOWEL_MODIFIER
+
+h = H | HVM; # https://github.com/harfbuzz/harfbuzz/issues/1102
 
 # Override: Adhoc ZWJ placement. https://github.com/harfbuzz/harfbuzz/issues/542#issuecomment-353169729
-consonant_modifiers = CMAbv* CMBlw* ((ZWJ?.H.ZWJ? B | SUB) VS? CMAbv? CMBlw*)*;
+consonant_modifiers = CMAbv* CMBlw* ((ZWJ?.h.ZWJ? B | SUB) VS? CMAbv? CMBlw*)*;
 # Override: Allow two MBlw. https://github.com/harfbuzz/harfbuzz/issues/376
 medial_consonants = MPre? MAbv? MBlw?.MBlw? MPst?;
 dependent_vowels = VPre* VAbv* VBlw* VPst*;
-vowel_modifiers = VMPre* VMAbv* VMBlw* VMPst*;
+vowel_modifiers = HVM? VMPre* VMAbv* VMBlw* VMPst*;
 final_consonants = FAbv* FBlw* FPst* FM?;
 
 complex_syllable_tail =
@@ -108,7 +111,7 @@ complex_syllable_tail =
 virama_terminated_cluster =
 	(R|CS)? (B | GB) VS?
 	consonant_modifiers
-	ZWJ?.H.ZWJ?
+	ZWJ?.h.ZWJ?
 ;
 standard_cluster =
 	(R|CS)? (B | GB) VS?
diff --git a/src/hb-ot-shape-complex-use-table.cc b/src/hb-ot-shape-complex-use-table.cc
index e9d969fb3..e9c88aec4 100644
--- a/src/hb-ot-shape-complex-use-table.cc
+++ b/src/hb-ot-shape-complex-use-table.cc
@@ -24,6 +24,7 @@
 #define GB	USE_GB	/* BASE_OTHER */
 #define H	USE_H	/* HALANT */
 #define HN	USE_HN	/* HALANT_NUM */
+#define HVM	USE_HVM	/* HALANT_OR_VOWEL_MODIFIER */
 #define IND	USE_IND	/* BASE_IND */
 #define N	USE_N	/* BASE_NUM */
 #define O	USE_O	/* OTHER */
@@ -508,7 +509,7 @@ static const USE_TABLE_ELEMENT_TYPE use_table[] = {
   /* 11010 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 11020 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 11030 */     B,     B,     B,     B,     B,     B,     B,     B,  VAbv,  VAbv,  VAbv,  VAbv,  VBlw,  VBlw,  VBlw,  VBlw,
-  /* 11040 */  VBlw,  VBlw,  VAbv,  VAbv,  VAbv,  VAbv,     H,     O,     O,     O,     O,     O,     O,     O,     O,     O,
+  /* 11040 */  VBlw,  VBlw,  VAbv,  VAbv,  VAbv,  VAbv,   HVM,     O,     O,     O,     O,     O,     O,     O,     O,     O,
   /* 11050 */     O,     O,     N,     N,     N,     N,     N,     N,     N,     N,     N,     N,     N,     N,     N,     N,
   /* 11060 */     N,     N,     N,     N,     N,     N,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 11070 */     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,     O,    HN,
@@ -800,6 +801,7 @@ hb_use_get_category (hb_codepoint_t u)
 #undef GB
 #undef H
 #undef HN
+#undef HVM
 #undef IND
 #undef N
 #undef O
diff --git a/src/hb-ot-shape-complex-use.hh b/src/hb-ot-shape-complex-use.hh
index b8123e791..ab56e1b8f 100644
--- a/src/hb-ot-shape-complex-use.hh
+++ b/src/hb-ot-shape-complex-use.hh
@@ -88,7 +88,10 @@ enum use_category_t {
   USE_VMPre	= 23,	/* VOWEL_MOD_PRE */
   USE_SMAbv	= 41,	/* SYM_MOD_ABOVE */
   USE_SMBlw	= 42,	/* SYM_MOD_BELOW */
-  USE_CS	= 43	/* CONS_WITH_STACKER */
+  USE_CS	= 43,	/* CONS_WITH_STACKER */
+
+  /* https://github.com/harfbuzz/harfbuzz/issues/1102 */
+  USE_HVM	= 44,	/* HALANT_OR_VOWEL_MODIFIER */
 };
 
 HB_INTERNAL USE_TABLE_ELEMENT_TYPE
diff --git a/test/shaping/data/in-house/fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf b/test/shaping/data/in-house/fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf
new file mode 100644
index 000000000..13c4d8a3b
Binary files /dev/null and b/test/shaping/data/in-house/fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf differ
diff --git a/test/shaping/data/in-house/tests/use-syllable.tests b/test/shaping/data/in-house/tests/use-syllable.tests
index 5d2fab39c..d8f1dff14 100644
--- a/test/shaping/data/in-house/tests/use-syllable.tests
+++ b/test/shaping/data/in-house/tests/use-syllable.tests
@@ -6,3 +6,6 @@
 ../fonts/373e67bf41ca264e260a9716162b71a23549e885.ttf:--no-glyph-names:U+A8AC,U+A8B4,U+A8B5:[2=0+377|3=0+242|4=0+210]
 ../fonts/59a585a63b3df608fbeef00956c8c108deec7de6.ttf:--no-glyph-names:U+1BC7,U+1BEA,U+1BF3:[1=0+749|2=0+402|4=0+535|3=0+401]
 ../fonts/1ed7e9064f008f62de6ff0207bb4dd29409597a5.ttf::U+11064,U+1107F,U+11052,U+11065,U+1107F,U+11053:[brm_num100.1=0+2224|brm_num1000.2=3+1834]
+../fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf::U+11013,U+11042,U+11046:[brm_KA=0+754|brm_vowelEE=0@-383,0+0|brm_virama=0@-524,0+0]
+../fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf::U+11013,U+11044,U+11046:[brm_KA=0+754|brm_vowelOO=0@-647,0+0|brm_virama=0@-524,0+0]
+../fonts/28f497629c04ceb15546c9a70e0730125ed6698d.ttf::U+11013,U+1103C:[brm_KA=0+754|brm_vowelU=0@-403,0+0]