--- a/hgext3rd/topic/destination.py	Fri Oct 14 00:54:04 2016 +0200
+++ b/hgext3rd/topic/destination.py	Thu Feb 23 13:58:52 2017 +0100
@@ -61,7 +61,7 @@
     else:
         return orig(repo)
 
-def _destupdatetopic(repo, clean, check):
+def _destupdatetopic(repo, clean, check=None):
     """decide on an update destination from current topic"""
     movemark = node = None
     topic = repo.currenttopic