--- a/mercurial/changegroup.py	Fri Sep 17 19:03:13 2010 -0500
+++ b/mercurial/changegroup.py	Fri Sep 17 19:24:29 2010 -0500
@@ -149,7 +149,7 @@
     def seek(self, pos):
         return self._stream.seek(pos)
     def tell(self):
-        return self._stream.tell(pos)
+        return self._stream.tell()
 
 class headerlessfixup(object):
     def __init__(self, fh, h):