diff -r 94bbc18daa99 -r 0ba067a97d06 src/topic/__init__.py
--- a/src/topic/__init__.py	Wed Jun 10 15:01:36 2015 -0400
+++ b/src/topic/__init__.py	Wed Jun 10 15:26:50 2015 -0400
@@ -18,6 +18,8 @@
 from mercurial import phases
 from mercurial import util
 
+from . import revset as topicrevset
+
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
@@ -94,3 +96,4 @@
     return ret
 
 extensions.wrapcommand(commands.table, 'update', updatewrap)
+topicrevset.modsetup()