diff --git a/src/hb-ot-cff-common.hh b/src/hb-ot-cff-common.hh
index 0cd05d0e2..e7ac0bac2 100644
--- a/src/hb-ot-cff-common.hh
+++ b/src/hb-ot-cff-common.hh
@@ -589,7 +589,7 @@ struct FDSelect0 {
 
 template <typename GID_TYPE, typename FD_TYPE>
 struct FDSelect3_4_Range {
-  bool sanitize (hb_sanitize_context_t *c, const void */*nullptr*/, unsigned int fdcount) const
+  bool sanitize (hb_sanitize_context_t *c, const void * /*nullptr*/, unsigned int fdcount) const
   {
     TRACE_SANITIZE (this);
     return_trace (first < c->get_num_glyphs () && (fd < fdcount));