diff --git a/uppsrc/CtrlCore/CtrlCore.h b/uppsrc/CtrlCore/CtrlCore.h
index 91bb0e703..12cd7b4d5 100644
--- a/uppsrc/CtrlCore/CtrlCore.h
+++ b/uppsrc/CtrlCore/CtrlCore.h
@@ -1141,6 +1141,7 @@ public:
 	Callback     operator<<=(Callback  action) { WhenAction = action; return action; }
 
 	Event<>&     operator<<(Event<> action)    { return WhenAction << action; }
+	Event<>&     operator^=(Event<> action)    { return WhenAction = action; }
 
 	void    SetTimeCallback(int delay_ms, Function<void ()> cb, int id = 0);
 	void    KillTimeCallback(int id = 0);