--- a/hgext3rd/topic/__init__.py	Wed Jun 21 01:05:46 2017 +0530
+++ b/hgext3rd/topic/__init__.py	Wed Jun 21 02:00:01 2017 +0530
@@ -255,30 +255,30 @@
 
 @command('topics [TOPIC]', [
         ('', 'clear', False, 'clear active topic if any'),
-        ('', 'change', '', 'revset of existing revisions to change topic'),
+        ('r', 'rev', '', 'revset of existing revisions', _('REV')),
         ('l', 'list', False, 'show the stack of changeset in the topic'),
     ] + commands.formatteropts)
-def topics(ui, repo, topic='', clear=False, change=None, list=False, **opts):
+def topics(ui, repo, topic='', clear=False, rev=None, list=False, **opts):
     """View current topic, set current topic, or see all topics.
 
     The --verbose version of this command display various information on the state of each topic."""
     if list:
-        if clear or change:
-            raise error.Abort(_("cannot use --clear or --change with --list"))
+        if clear or rev:
+            raise error.Abort(_("cannot use --clear or --rev with --list"))
         if not topic:
             topic = repo.currenttopic
         if not topic:
             raise error.Abort(_('no active topic to list'))
         return stack.showstack(ui, repo, topic, opts)
 
-    if change:
+    if rev:
         if not obsolete.isenabled(repo, obsolete.createmarkersopt):
-            raise error.Abort(_('must have obsolete enabled to use --change'))
+            raise error.Abort(_('must have obsolete enabled to change topics'))
         if not topic and not clear:
             raise error.Abort('changing topic requires a topic name or --clear')
-        if any(not c.mutable() for c in repo.set('%r and public()', change)):
+        if any(not c.mutable() for c in repo.set('%r and public()', rev)):
             raise error.Abort("can't change topic of a public change")
-        _changetopics(ui, repo, change, topic, clear)
+        _changetopics(ui, repo, rev, topic, clear)
     if clear:
         if repo.vfs.exists('topic'):
             repo.vfs.unlink('topic')