diff --git a/src/hb-ot-shape-complex-arabic-win1256.hh b/src/hb-ot-shape-complex-arabic-win1256.hh
index 3a20b507d..8edd3ba80 100644
--- a/src/hb-ot-shape-complex-arabic-win1256.hh
+++ b/src/hb-ot-shape-complex-arabic-win1256.hh
@@ -133,7 +133,6 @@
  */
 
 #define OT_LOOKUP_TYPE_SUBST_SINGLE	1u
-#define OT_LOOKUP_TYPE_SUBST_MULTIPLE	2u
 #define OT_LOOKUP_TYPE_SUBST_LIGATURE	4u
 
 #define OT_SUBLOOKUP_SINGLE_SUBST_FORMAT2(Name, FromGlyphs, ToGlyphs) \