--- a/widget/gtkxtbin/gtk2xtbin.c
+++ b/widget/gtkxtbin/gtk2xtbin.c
@@ -614,16 +614,21 @@ xt_client_create ( XtClient* xtclient ,
                     (XtEventHandler)xt_client_focus_listener, 
                     xtclient);
   XSync(xtclient->xtdisplay, FALSE);
 }
 
 void
 xt_client_unrealize ( XtClient* xtclient )
 {
+  /* Explicitly destroy the child_widget window because this is actually a
+     child of the socket window.  It is not a child of top_widget's window
+     when that is destroyed. */
+  XtUnrealizeWidget(xtclient->child_widget);
+
 #if XlibSpecificationRelease >= 6
   XtUnregisterDrawable(xtclient->xtdisplay,
                        xtclient->top_widget->core.window);
 #else
   _XtUnregisterWindow(xtclient->top_widget->core.window,
                       xtclient->top_widget);
 #endif