Index: xfce-desktop.c
===================================================================
--- xfce-desktop.c	(revision 20294)
+++ xfce-desktop.c	(working copy)
@@ -107,6 +107,8 @@
 
 static gboolean xfce_desktop_expose(GtkWidget *w,
                                     GdkEventExpose *evt);
+static gboolean xfce_desktop_delete(GtkWidget *w,
+                                    GdkEventAny *evt);
 
 /* private functions */
 
@@ -508,6 +510,7 @@
     widget_class->realize = xfce_desktop_realize;
     widget_class->unrealize = xfce_desktop_unrealize;
     widget_class->expose_event = xfce_desktop_expose;
+    widget_class->delete_event = xfce_desktop_delete;
 }
 
 static void
@@ -691,8 +694,13 @@
     return FALSE;
 }
 
+static gboolean
+xfce_desktop_delete(GtkWidget *w,
+                    GdkEventAny *evt)
+{
+    return TRUE;
+}
 
-
 /* public api */
 
 /**