diff -r 70a7478c33de -r 597b071a0e0d mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Sat Dec 13 14:26:38 2014 -0500
+++ b/mercurial/cmdutil.py	Sat Dec 13 19:23:30 2014 -0500
@@ -2028,7 +2028,7 @@
         sub = wctx.sub(subpath)
         try:
             submatch = matchmod.narrowmatcher(subpath, match)
-            subbad, subforgot = sub.forget(ui, submatch, prefix)
+            subbad, subforgot = sub.forget(submatch, prefix)
             bad.extend([subpath + '/' + f for f in subbad])
             forgot.extend([subpath + '/' + f for f in subforgot])
         except error.LookupError: