--- a/hgext3rd/topic/__init__.py	Tue Sep 26 12:39:11 2017 +0200
+++ b/hgext3rd/topic/__init__.py	Tue Sep 26 12:58:10 2017 +0200
@@ -312,10 +312,10 @@
                 peer.__class__ = topicpeer
             return peer
 
-        def transaction(self, *a, **k):
+        def transaction(self, desc, *a, **k):
             ctr = self.currenttransaction()
-            tr = super(topicrepo, self).transaction(*a, **k)
-            if ctr is not None:
+            tr = super(topicrepo, self).transaction(desc, *a, **k)
+            if desc is 'strip' or ctr is not None:
                 return tr
 
             # real transaction start