diff -r b3d78d82d84c -r e0e28e910fa3 mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/bundlerepo.py	Thu Apr 09 16:25:48 2015 -0400
@@ -240,7 +240,7 @@
 
         if isinstance(self.bundle, bundle2.unbundle20):
             cgparts = [part for part in self.bundle.iterparts()
-                       if (part.type == 'b2x:changegroup')
+                       if (part.type == 'changegroup')
                        and (part.params.get('version', '01')
                             in changegroup.packermap)]