diff --git a/mercurial/exchange.py b/mercurial/exchange.py
--- a/mercurial/exchange.py
+++ b/mercurial/exchange.py
@@ -103,6 +103,9 @@ def push(repo, remote, force=False, revs
         try:
             _pushdiscovery(pushop)
             if _pushcheckoutgoing(pushop):
+                pushop.repo.prepushoutgoinghooks(pushop.repo,
+                                                 pushop.remote,
+                                                 pushop.outgoing)
                 _pushchangeset(pushop)
             _pushcomputecommonheads(pushop)
             _pushsyncphase(pushop)
diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -1696,6 +1696,13 @@ class localrepository(object):
         """
         pass
 
+    @unfilteredpropertycache
+    def prepushoutgoinghooks(self):
+        """Return util.hooks consists of "(repo, remote, outgoing)"
+        functions, which are called before pushing changesets.
+        """
+        return util.hooks()
+
     def push(self, remote, force=False, revs=None, newbranch=False):
         return exchange.push(self, remote, force, revs, newbranch)