diff --git a/src/hb-ot-shape-complex-indic-machine.rl b/src/hb-ot-shape-complex-indic-machine.rl
index e519e71d1..3c7193d92 100644
--- a/src/hb-ot-shape-complex-indic-machine.rl
+++ b/src/hb-ot-shape-complex-indic-machine.rl
@@ -56,7 +56,7 @@ RS   = 14;
 Coeng = 15;
 
 c = C | Ra;
-n = N N?;
+n = (N.N? | ZWNJ?.RS);
 z = ZWJ|ZWNJ;
 h = H | Coeng;
 matra_group = (M | RS) N? H?;
diff --git a/test/shaping/texts/in-tree/shaper-indic/south-east-asian/script-khmer/misc/misc.txt b/test/shaping/texts/in-tree/shaper-indic/south-east-asian/script-khmer/misc/misc.txt
index 3396db319..c9e5443f0 100644
--- a/test/shaping/texts/in-tree/shaper-indic/south-east-asian/script-khmer/misc/misc.txt
+++ b/test/shaping/texts/in-tree/shaper-indic/south-east-asian/script-khmer/misc/misc.txt
@@ -12,3 +12,5 @@
 ង្ឈឹ
 ង្គ្រ
 ង្រ្គ
+ម៉្លេះ
+ម‌៉្លេះ