diff -r 012be286b2c4 -r c5f36402daad mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Wed Jun 10 03:20:20 2009 +0200
+++ b/mercurial/cmdutil.py	Wed Jun 10 15:10:21 2009 +0200
@@ -1110,7 +1110,7 @@
                 fncache[rev] = matches
                 wanted.add(rev)
 
-    class followfilter:
+    class followfilter(object):
         def __init__(self, onlyfirst=False):
             self.startrev = nullrev
             self.roots = []