diff --git a/libsrc/c128/toggle_videomode.s b/libsrc/c128/toggle_videomode.s
index 3ef332326..9af136762 100644
--- a/libsrc/c128/toggle_videomode.s
+++ b/libsrc/c128/toggle_videomode.s
@@ -9,7 +9,7 @@
         .import         SWAPPER, BSOUT
 
 ; This function is deprecated
-.assert         * < 0, warning, "toggle_videomode() is deprecated, please use videomode() instead!"
+.assert         * < 0, ldwarning, "toggle_videomode() is deprecated, please use videomode() instead!"