--- a/hgext3rd/topic/__init__.py	Tue Aug 16 15:43:06 2016 +0200
+++ b/hgext3rd/topic/__init__.py	Tue Aug 23 23:38:28 2016 +0200
@@ -301,6 +301,10 @@
             # XXX we should include the data even when not verbose
             data = stack.stackdata(repo, topic)
             fm.plain(' (')
+            fm.write('branches+', 'on branch: %s',
+                     '+'.join(data['branches']), # XXX use list directly after 4.0 is released
+                     label='topic.list.branches')
+            fm.plain(', ')
             fm.write('changesetcount', '%d changesets', data['changesetcount'],
                      label='topic.list.changesetcount')
             if data['troubledcount']: