--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -366,6 +366,7 @@ class localrepository:
self.tags[k] = bin(n)
except KeyError: pass
try:
+ if key == 'tip': return self.changelog.tip()
return self.tags[key]
except KeyError:
return self.changelog.lookup(key)