diff --git a/src/hb-ot-tag.h b/src/hb-ot-tag.h
index e3523a001..a4e8a49c2 100644
--- a/src/hb-ot-tag.h
+++ b/src/hb-ot-tag.h
@@ -39,7 +39,7 @@ HB_BEGIN_DECLS
 #define HB_OT_TAG_DEFAULT_SCRIPT	HB_TAG ('D', 'F', 'L', 'T')
 #define HB_OT_TAG_DEFAULT_LANGUAGE	HB_TAG ('d', 'f', 'l', 't')
 
-#define HB_OT_MAX_TAGS_PER_SCRIPT	2u
+#define HB_OT_MAX_TAGS_PER_SCRIPT	3u
 #define HB_OT_MAX_TAGS_PER_LANGUAGE	3u
 
 HB_EXTERN void