--- a/mercurial/context.py	Tue Apr 29 16:49:27 2014 -0500
+++ b/mercurial/context.py	Thu Aug 15 15:00:03 2013 -0500
@@ -1531,7 +1531,7 @@
         # invert comparison to reuse the same code path
         return fctx.cmp(self)
 
-class memctx(object):
+class memctx(committablectx):
     """Use memctx to perform in-memory commits via localrepo.commitctx().
 
     Revision information is supplied at initialization time while