diff --git a/hgext/notify.py b/hgext/notify.py
--- a/hgext/notify.py
+++ b/hgext/notify.py
@@ -455,7 +455,7 @@ def hook(ui, repo, hooktype, node=None, 
     changegroup. else send one email per changeset.'''
 
     n = notifier(ui, repo, hooktype)
-    ctx = repo[node]
+    ctx = repo.unfiltered()[node]
 
     if not n.subs:
         ui.debug('notify: no subscribers to repository %s\n' % n.root)