--- a/web/views/facets.py	Fri Oct 14 10:34:08 2011 +0200
+++ b/web/views/facets.py	Fri Oct 14 13:36:39 2011 +0200
@@ -20,6 +20,8 @@
 __docformat__ = "restructuredtext en"
 _ = unicode
 
+from warnings import warn
+
 from logilab.mtconverter import xml_escape
 
 from cubicweb.appobject import objectify_selector