diff --git a/src/x11/window.cpp b/src/x11/window.cpp
index 4ae7c1468b..1edf8c6604 100644
--- a/src/x11/window.cpp
+++ b/src/x11/window.cpp
@@ -1287,7 +1287,7 @@ void wxWindowX11::OnInternalIdle()
 
     // This calls the UI-update mechanism (querying windows for
     // menu/toolbar/control state information)
-    if (wxUpdateUIEvent::CanUpdate(this))
+    if (wxUpdateUIEvent::CanUpdate((wxWindow*) this))
         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
 
     // Set the input focus if couldn't do it before