diff --git a/src/qt/window.cpp b/src/qt/window.cpp
index 8ba5a764e5..920dc70523 100644
--- a/src/qt/window.cpp
+++ b/src/qt/window.cpp
@@ -81,6 +81,9 @@ void wxQtShortcutHandler::activated()
 
 //##############################################################################
 
+#ifdef __WXUNIVERSAL__
+    IMPLEMENT_ABSTRACT_CLASS(wxWindow, wxWindowBase)
+#endif // __WXUNIVERSAL__
 
 // We use the QObject property capabilities to store the wxWindow pointer, so we
 // don't need to use a separate lookup table. We also want to use it in the proper