--- a/Allura/allura/lib/helpers.py
+++ b/Allura/allura/lib/helpers.py
@@ -26,6 +26,7 @@
 from formencode.variabledecode import variable_decode
 import formencode
 from jinja2 import Markup
+from paste.deploy.converters import asbool
 
 from webhelpers import date, feedgenerator, html, number, misc, text