diff -r 70d5906e0461 Objects/object.c
--- a/Objects/object.c	Mon Oct 29 21:25:01 2012 +0200
+++ b/Objects/object.c	Mon Oct 29 13:52:47 2012 -0700
@@ -1710,6 +1710,9 @@
 
     if (PyType_Ready(&_PyNamespace_Type) < 0)
         Py_FatalError("Can't initialize namespace type");
+
+    if (PyType_Ready(&PyCell_Type) < 0)
+        Py_FatalError("Can't initialize cell type");
 }