--- a/hgext/convert/common.py	Mon Nov 26 17:24:21 2007 -0800
+++ b/hgext/convert/common.py	Tue Nov 27 09:44:09 2007 -0800
@@ -40,7 +40,7 @@
 class converter_source(object):
     """Conversion source interface"""
 
-    def __init__(self, ui, path, rev=None):
+    def __init__(self, ui, path=None, rev=None):
         """Initialize conversion source (or raise NoRepo("message")
         exception if path is not a valid repository)"""
         self.ui = ui