diff -r 0e5485634817 Objects/typeobject.c
--- a/Objects/typeobject.c	Tue Jul 05 22:00:25 2011 +0200
+++ b/Objects/typeobject.c	Wed Jul 06 02:30:29 2011 +0200
@@ -967,6 +967,8 @@
     assert(basedealloc);
     basedealloc(self);
 
+    PyType_Modified(type);
+
     /* Can't reference self beyond this point */
     Py_DECREF(type);