diff -r 012be286b2c4 -r c5f36402daad mercurial/util.py
--- a/mercurial/util.py	Wed Jun 10 03:20:20 2009 +0200
+++ b/mercurial/util.py	Wed Jun 10 15:10:21 2009 +0200
@@ -749,7 +749,7 @@
         raise
     return temp
 
-class atomictempfile:
+class atomictempfile(object):
     """file-like object that atomically updates a file
 
     All writes will be redirected to a temporary copy of the original