diff --git a/src/hb-ot-layout.hh b/src/hb-ot-layout.hh
index d64489db0..ac55459b6 100644
--- a/src/hb-ot-layout.hh
+++ b/src/hb-ot-layout.hh
@@ -200,8 +200,7 @@ _hb_next_syllable (hb_buffer_t *buffer, unsigned int start)
 enum hb_unicode_props_flags_t {
   UPROPS_MASK_GEN_CAT	= 0x001Fu,
   UPROPS_MASK_IGNORABLE	= 0x0020u,
-  UPROPS_MASK_HIDDEN	= 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3,
-                                    * or TAG characters */
+  UPROPS_MASK_HIDDEN	= 0x0040u, /* MONGOLIAN FREE VARIATION SELECTOR 1..3, or TAG characters */
   UPROPS_MASK_CONTINUATION=0x0080u,
 
   /* If GEN_CAT=FORMAT, top byte masks: */