diff -r 1f3b94e8dc40 -r 8f02682ff3b0 mercurial/subrepo.py
--- a/mercurial/subrepo.py	Tue Jan 27 10:14:23 2015 -0500
+++ b/mercurial/subrepo.py	Tue Jan 27 20:57:43 2015 -0500
@@ -435,7 +435,7 @@
         """
         raise NotImplementedError
 
-    def add(self, ui, match, dryrun, listsubrepos, prefix, explicitonly):
+    def add(self, ui, match, prefix, explicitonly, **opts):
         return []
 
     def addremove(self, matcher, prefix, opts, dry_run, similarity):