Ticket #9640: patch.diff

django/db/models/fields/__init__.py

@@ -371 +371 @@
 
 class BooleanField(Field):
     def __init__(self, *args, **kwargs):
-        kwargs['blank'] = True
+        kwargs['blank'] = not 'choices' in kwargs
         if 'default' not in kwargs and not kwargs.get('null'):
             kwargs['default'] = False
         Field.__init__(self, *args, **kwargs)