diff --git a/src/sugar3/graphics/palettewindow.py b/src/sugar3/graphics/palettewindow.py
index 995e2581..5483ca1a 100644
--- a/src/sugar3/graphics/palettewindow.py
+++ b/src/sugar3/graphics/palettewindow.py
@@ -994,9 +994,9 @@ class Invoker(GObject.GObject):
             # menu item. We need to postpone destruction of the palette until
             # after all signals have propagated from the menu item to the
             # palette owner.
-            GObject.idle_add(lambda old_palette=self._palette:
-                             old_palette.destroy(),
-                             priority=GObject.PRIORITY_LOW)
+            GLib.idle_add(lambda old_palette=self._palette:
+                          old_palette.destroy(),
+                          priority=GObject.PRIORITY_LOW)
 
         self._palette = palette