diff --git a/include/wx/generic/listctrl.h b/include/wx/generic/listctrl.h
index ca470e3f41..774b20a7a3 100644
--- a/include/wx/generic/listctrl.h
+++ b/include/wx/generic/listctrl.h
@@ -239,7 +239,7 @@ private:
     // arrows but let the other navigation characters through
 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
     virtual WXLRESULT
-    MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
+    MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) wxOVERRIDE;
 #endif // __WXMSW__
 
     WX_FORWARD_TO_SCROLL_HELPER()