diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 0854f2bc8d..b9b2d7cef3 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -1669,16 +1669,13 @@ bool wxWindowGTK::GTKShouldIgnoreEvent() const
     return g_blockEventsOnDrag;
 }
 
-int wxWindowGTK::GTKCallbackCommonPrologue(GdkEventAny *event) const
+int wxWindowGTK::GTKCallbackCommonPrologue(GdkEventAny* WXUNUSED(event)) const
 {
     if (g_blockEventsOnDrag)
         return TRUE;
     if (g_blockEventsOnScroll)
         return TRUE;
 
-    if (!GTKIsOwnWindow(event->window))
-        return FALSE;
-
     return -1;
 }