diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 3d0cf28dce..7ff47a7941 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -1166,7 +1166,7 @@ wxWindowGTK *FindWindowForMouseEvent(wxWindowGTK *win, wxCoord& x, wxCoord& y)
     wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
     while (node)
     {
-        wxWindowGTK *child = node->GetData();
+        wxWindow* child = static_cast<wxWindow*>(node->GetData());
 
         node = node->GetNext();
         if (!child->IsShown())