--- Objects/classobject.c.ORIG	2008-05-25 11:04:06.000000000 +0200
+++ Objects/classobject.c	2008-05-25 11:05:20.000000000 +0200
@@ -501,8 +501,10 @@
 static PyObject *
 instancemethod_descr_get(PyObject *descr, PyObject *obj, PyObject *type) {
 	register PyObject *func = PyInstanceMethod_GET_FUNCTION(descr);
-	if (obj == NULL)
+        if (obj == NULL) {
+		Py_INCREF(func);
 		return func;
+        }
 	else
 		return PyMethod_New(func, obj);
 }