--- a/hgext/mq.py	Thu Jan 30 20:22:43 2014 -0800
+++ b/hgext/mq.py	Tue Feb 11 09:00:38 2014 -0800
@@ -3409,7 +3409,7 @@
     """
     revset.getargs(x, 0, 0, _("mq takes no arguments"))
     applied = set([repo[r.node].rev() for r in repo.mq.applied])
-    return [r for r in subset if r in applied]
+    return revset.baseset([r for r in subset if r in applied])
 
 # tell hggettext to extract docstrings from these functions:
 i18nfunctions = [revsetmq]