diff --git a/django/core/xheaders.py b/django/core/xheaders.py
index 98d2586b75..354463b5a8 100644
--- a/django/core/xheaders.py
+++ b/django/core/xheaders.py
@@ -9,14 +9,13 @@ that custom headers are prefxed with "X-").
 Next time you're at slashdot.org, watch out for X-Fry and X-Bender. :)
 """
 
-def populate_xheaders(request, response, package, python_module_name, object_id):
+def populate_xheaders(request, response, model, object_id):
     """
     Adds the "X-Object-Type" and "X-Object-Id" headers to the given
-    HttpResponse according to the given package, python_module_name and
-    object_id -- but only if the given HttpRequest object has an IP address
-    within the INTERNAL_IPS setting.
+    HttpResponse according to the given model and object_id -- but only if the
+    given HttpRequest object has an IP address within the INTERNAL_IPS setting.
     """
     from django.conf.settings import INTERNAL_IPS
     if request.META.get('REMOTE_ADDR') in INTERNAL_IPS:
-        response['X-Object-Type'] = "%s.%s" % (package, python_module_name)
+        response['X-Object-Type'] = "%s.%s" % (model._meta.app_label, model._meta.object_name.lower())
         response['X-Object-Id'] = str(object_id)