diff -r 025ec0f08cb6 -r 1004d3cd65fd mercurial/cmdutil.py
--- a/mercurial/cmdutil.py	Wed Apr 16 00:37:24 2014 +0900
+++ b/mercurial/cmdutil.py	Wed Apr 16 00:37:24 2014 +0900
@@ -2379,6 +2379,11 @@
 
     return cmd
 
+# a list of (ui, repo, otherpeer, opts, missing) functions called by
+# commands.outgoing.  "missing" is "missing" of the result of
+# "findcommonoutgoing()"
+outgoinghooks = util.hooks()
+
 # a list of (ui, repo) functions called by commands.summary
 summaryhooks = util.hooks()