Index: django/db/models/fields/__init__.py
===================================================================
--- django/db/models/fields/__init__.py	(revision 4558)
+++ django/db/models/fields/__init__.py	(working copy)
@@ -758,18 +758,15 @@
     def get_manipulator_field_objs(self):
         return [oldforms.PositiveSmallIntegerField]
 
-class SlugField(Field):
+class SlugField(CharField):
     def __init__(self, *args, **kwargs):
         kwargs['maxlength'] = kwargs.get('maxlength', 50)
         kwargs.setdefault('validator_list', []).append(validators.isSlug)
         # Set db_index=True unless it's been set manually.
         if not kwargs.has_key('db_index'):
             kwargs['db_index'] = True
-        Field.__init__(self, *args, **kwargs)
+        CharField.__init__(self, *args, **kwargs)
 
-    def get_manipulator_field_objs(self):
-        return [oldforms.TextField]
-
 class SmallIntegerField(IntegerField):
     def get_manipulator_field_objs(self):
         return [oldforms.SmallIntegerField]