diff --git a/sys/vaapisink/gstvaapisink.c b/sys/vaapisink/gstvaapisink.c
index 2c2fb395c7..3103045b23 100644
--- a/sys/vaapisink/gstvaapisink.c
+++ b/sys/vaapisink/gstvaapisink.c
@@ -119,7 +119,7 @@ gst_vaapisink_ensure_display(GstVaapiSink *sink)
     if (!sink->display) {
         sink->display = gst_vaapi_display_x11_new(sink->display_name);
         if (!sink->display || !gst_vaapi_display_get_display(sink->display))
-            return NULL;
+            return FALSE;
     }
     return sink->display != NULL;
 }