--- a/hgext3rd/topic/destination.py	Wed Mar 30 03:12:43 2016 -0700
+++ b/hgext3rd/topic/destination.py	Wed Mar 30 03:15:47 2016 -0700
@@ -86,7 +86,7 @@
         subquery = 'max(%s)' % subquery
     return repo.revs(subquery, branch, branch, branch)
 
-def setupdest():
+def setupdest(ui):
     if util.safehasattr(destutil, '_destmergebranch'):
         extensions.wrapfunction(destutil, '_destmergebranch', _destmergebranch)
     rebase = extensions.find('rebase')