diff --git a/audio/out/ao_coreaudio_utils.c b/audio/out/ao_coreaudio_utils.c
index 14db8e39cd..978165d652 100644
--- a/audio/out/ao_coreaudio_utils.c
+++ b/audio/out/ao_coreaudio_utils.c
@@ -470,7 +470,7 @@ bool ca_change_physical_format_sync(struct ao *ao, AudioStreamID stream,
 
     ca_print_asbd(ao, "setting stream physical format:", &change_format);
 
-    sem_t wakeup;
+    mp_sem_t wakeup;
     if (mp_sem_init(&wakeup, 0, 0)) {
         MP_WARN(ao, "OOM\n");
         return false;