diff -r f388ceae2250 -r cda18ded2c48 hgext/shelve.py
--- a/hgext/shelve.py	Fri Jan 16 16:25:30 2015 -0800
+++ b/hgext/shelve.py	Thu Jan 15 14:39:41 2015 -0800
@@ -43,6 +43,7 @@
         self.repo = repo
         self.name = name
         self.vfs = scmutil.vfs(repo.join('shelved'))
+        self.ui = self.repo.ui
         if filetype:
             self.fname = name + '.' + filetype
         else:
@@ -82,7 +83,7 @@
         return bundlerepo.bundlerepository(self.repo.baseui, self.repo.root,
                                            self.vfs.join(self.fname))
     def writebundle(self, cg):
-        changegroup.writebundle(cg, self.fname, 'HG10UN', self.vfs)
+        changegroup.writebundle(self.ui, cg, self.fname, 'HG10UN', self.vfs)
 
 class shelvedstate(object):
     """Handle persistence during unshelving operations.