diff --git a/django/contrib/admin/sites.py b/django/contrib/admin/sites.py
index 4e95a06bba..6c6f47e388 100644
--- a/django/contrib/admin/sites.py
+++ b/django/contrib/admin/sites.py
@@ -201,6 +201,8 @@ class AdminSite(object):
         """
         Displays the login form for the given HttpRequest.
         """
+        from django.contrib.auth.models import User
+
         # If this isn't already the login page, display it.
         if not request.POST.has_key(LOGIN_FORM_KEY):
             if request.POST: