diff --git a/sugar/graphics/button.py b/sugar/graphics/button.py
index ea4df95c..28c9f59c 100644
--- a/sugar/graphics/button.py
+++ b/sugar/graphics/button.py
@@ -89,9 +89,12 @@ class Button(hippo.CanvasBox):
         
         [x, y] = [None, None]
         if popup_context:
-            [x, y] = popup_context.get_position(self._icon, popup)
+            try:
+                [x, y] = popup_context.get_position(self._icon, popup)
+            except NotImplementedError:
+                pass
 
-        if (not x) or (not y):
+        if [x, y] == [None, None]:
             context = self._icon.get_context()
             #[x, y] = context.translate_to_screen(self._icon)
             [x, y] = context.translate_to_widget(self._icon)
diff --git a/sugar/graphics/popupcontext.py b/sugar/graphics/popupcontext.py
index 59fb16bb..99498e93 100644
--- a/sugar/graphics/popupcontext.py
+++ b/sugar/graphics/popupcontext.py
@@ -44,4 +44,4 @@ class PopupContext(gobject.GObject):
         return self._active_control != None
 
     def get_position(self, control, popup):
-        return [None, None]
+        raise NotImplementedError