diff --git a/src/hb-ot-shape-complex-indic-private.hh b/src/hb-ot-shape-complex-indic-private.hh
index b7bce172c..e60b00aa4 100644
--- a/src/hb-ot-shape-complex-indic-private.hh
+++ b/src/hb-ot-shape-complex-indic-private.hh
@@ -114,13 +114,13 @@ enum indic_matra_category_t {
    * TODO: There are some split matras without Unicode decompositions.
    * We have to figure out what to do with them.
    */
-  INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT		= 8 | INDIC_MATRA_CATEGORY_BOTTOM,
-  INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT		= 8 | INDIC_MATRA_CATEGORY_LEFT,
-  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM		= 8 | INDIC_MATRA_CATEGORY_BOTTOM,
-  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT	= 8 | INDIC_MATRA_CATEGORY_BOTTOM,
-  INDIC_MATRA_CATEGORY_TOP_AND_LEFT		= 8 | INDIC_MATRA_CATEGORY_LEFT,
-  INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT	= 8 | INDIC_MATRA_CATEGORY_LEFT,
-  INDIC_MATRA_CATEGORY_TOP_AND_RIGHT		= 8 | INDIC_MATRA_CATEGORY_RIGHT,
+  INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT		= 8 + INDIC_MATRA_CATEGORY_BOTTOM,
+  INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT		= 8 + INDIC_MATRA_CATEGORY_LEFT,
+  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM		= 8 + INDIC_MATRA_CATEGORY_BOTTOM,
+  INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT	= 8 + INDIC_MATRA_CATEGORY_BOTTOM,
+  INDIC_MATRA_CATEGORY_TOP_AND_LEFT		= 8 + INDIC_MATRA_CATEGORY_LEFT,
+  INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT	= 8 + INDIC_MATRA_CATEGORY_LEFT,
+  INDIC_MATRA_CATEGORY_TOP_AND_RIGHT		= 8 + INDIC_MATRA_CATEGORY_RIGHT,
 
   INDIC_MATRA_CATEGORY_INVISIBLE		= INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
   INDIC_MATRA_CATEGORY_OVERSTRUCK		= INDIC_MATRA_CATEGORY_NOT_APPLICABLE,