diff --git a/sat/core/constants.py b/sat/core/constants.py
index fd804dbe..1ac765f4 100644
--- a/sat/core/constants.py
+++ b/sat/core/constants.py
@@ -438,7 +438,7 @@ class Const(object):
     def bool(cls, value):
         """@return (bool): bool value for associated constant"""
         assert isinstance(value, basestring)
-        return value.lower() in (cls.BOOL_TRUE, "1", "yes")
+        return value.lower() in (cls.BOOL_TRUE, "1", "yes", "on")
 
     @classmethod
     def boolConst(cls, value):