diff --git a/sugar/graphics/window.py b/sugar/graphics/window.py
index f3854e35..1ff1fdbb 100644
--- a/sugar/graphics/window.py
+++ b/sugar/graphics/window.py
@@ -9,6 +9,10 @@ class Window(gtk.Window):
         self.add(self._canvas)
         self._canvas.show()
 
+        self._canvas.connect_after('realize', self._window_realize_cb)
+
     def set_root(self, root):
         self._canvas.set_root(root)
 
+    def _window_realize_cb(self, canvas):
+        canvas.window.set_back_pixmap(None, False)