diff --git a/src/hb-map.cc b/src/hb-map.cc
index 702a926e0..332a318bd 100644
--- a/src/hb-map.cc
+++ b/src/hb-map.cc
@@ -220,7 +220,7 @@ hb_map_del (hb_map_t       *map,
  *
  * Since: REPLACEME
  **/
-bool
+hb_bool_t
 hb_map_has (const hb_map_t *map,
 	    hb_codepoint_t  key)
 {
diff --git a/src/hb-map.h b/src/hb-map.h
index 618228308..bf01f2dfa 100644
--- a/src/hb-map.h
+++ b/src/hb-map.h
@@ -101,7 +101,7 @@ HB_EXTERN void
 hb_map_del (hb_map_t       *map,
 	    hb_codepoint_t  key);
 
-HB_EXTERN bool
+HB_EXTERN hb_bool_t
 hb_map_has (const hb_map_t *map,
 	    hb_codepoint_t  key);