diff --git a/include/rtdef.h b/include/rtdef.h
index 9af4320112..9b12093dc7 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -1020,6 +1020,7 @@ enum
     RTGRAPHIC_PIXEL_FORMAT_ABGR888,
     RTGRAPHIC_PIXEL_FORMAT_ARGB565,
     RTGRAPHIC_PIXEL_FORMAT_ALPHA,
+    RTGRAPHIC_PIXEL_FORMAT_COLOR,
 };
 
 /**