diff --git a/pdb/groups/message.pdb b/pdb/groups/message.pdb
index 7ccbc3476e..c10660fa1f 100644
--- a/pdb/groups/message.pdb
+++ b/pdb/groups/message.pdb
@@ -39,7 +39,7 @@ HELP
   if (gimp->plug_in_manager->current_plug_in)
     domain = gimp_plug_in_get_undo_desc (gimp->plug_in_manager->current_plug_in);
   gimp_show_message (gimp, G_OBJECT (progress), GIMP_MESSAGE_WARNING,
-                     domain, message);
+                     domain, message, NULL);
 }
 CODE
     );