Index: _Missing.c
===================================================================
--- _Missing.c	(revision 68297)
+++ _Missing.c	(working copy)
@@ -242,7 +242,7 @@
   &Missing_as_number,			/*tp_as_number*/
   0,					/*tp_as_sequence*/
   0,					/*tp_as_mapping*/
-  (hashfunc)0,				/*tp_hash*/
+  (hashfunc)_Py_HashPointer,		/*tp_hash*/
   (ternaryfunc)Missing_call,		/*tp_call*/
   (reprfunc)Missing_str,		/*tp_str*/
   (getattrofunc)Missing_getattr,	/*tp_getattro*/
Index: tests.py
===================================================================
--- tests.py	(revision 68297)
+++ tests.py	(working copy)
@@ -33,6 +33,14 @@
 >>> Value == Value + 1
 1
 
+Missing values can be pickled:
+
+  >>> from pickle import dumps, loads
+  >>> dumps(Value)
+  'cMissing\\nV\\np0\\n.'
+  >>> loads(dumps(Value)) is Value
+  True
+
 $Id$
 """
 import unittest