Index: django/newforms/widgets.py
===================================================================
--- django/newforms/widgets.py	(revision 6706)
+++ django/newforms/widgets.py	(working copy)
@@ -317,9 +317,9 @@
                 % force_unicode(w) for w in self]))
 
 class RadioSelect(Select):
-
+    renderer = RadioFieldRenderer
     def __init__(self, *args, **kwargs):
-        self.renderer = kwargs.pop('renderer', None)
+        self.renderer = kwargs.pop('renderer', self.renderer)
         if not self.renderer:
             self.renderer = RadioFieldRenderer
         super(RadioSelect, self).__init__(*args, **kwargs)