diff --git a/interface/wx/event.h b/interface/wx/event.h
index a11d3c5ab7..e2988d7afa 100644
--- a/interface/wx/event.h
+++ b/interface/wx/event.h
@@ -3285,6 +3285,12 @@ public:
 /** @ingroup group_funcmacro_events */
 //@{
 
+/**
+    A special event type usually used to indicate that some wxEvent has yet
+    no type assigned.
+*/
+wxEventType wxEVT_NULL;
+
 /**
     Each wxEvent-derived class has an @e event-type associated.
     See the macro DEFINE_EVENT_TYPE() for more info.