diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index c9caff67e..34ac89b8d 100644
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -92,7 +92,7 @@ cmp_lookups (const void *p1, const void *p2)
 }
 
 
-#define MAX_FEATURES 100
+#define MAX_FEATURES 100 /* FIXME */
 
 struct hb_mask_allocator_t {