--- a/hgext/closehead.py	Thu Aug 23 12:25:54 2018 +0900
+++ b/hgext/closehead.py	Mon Oct 08 20:07:13 2018 +0200
@@ -28,7 +28,7 @@
 
 commitopts = cmdutil.commitopts
 commitopts2 = cmdutil.commitopts2
-commitopts3 = [('r', 'rev', '',
+commitopts3 = [('r', 'rev', [],
                _('revision to check'), _('REV'))]
 
 @command('close-head|close-heads', commitopts + commitopts2 + commitopts3,