diff -r 01e1e44f1eb3 -r bd4f5052a532 req.py
--- a/req.py	Fri Nov 16 11:52:06 2012 +0100
+++ b/req.py	Fri Nov 16 11:53:17 2012 +0100
@@ -88,6 +88,9 @@
         self._ = self.__ = gettext
         self.pgettext = pgettext
 
+    def get_option_value(self, option, foreid=None):
+        raise NotImplementedError
+
     def property_value(self, key):
         """return value of the property with the given key, giving priority to
         user specific value if any, else using site value