diff --git a/src/game_events/action_wml.cpp b/src/game_events/action_wml.cpp
index 44a5e7cfebee..0a6712e06d8d 100644
--- a/src/game_events/action_wml.cpp
+++ b/src/game_events/action_wml.cpp
@@ -965,7 +965,7 @@ WML_HANDLER_FUNCTION(on_undo, event_info, cfg)
 	}
 }
 
-WML_HANDLER_FUNCTION(on_redo, event_info, cfg)
+WML_HANDLER_FUNCTION(on_redo, , )
 {
 }