diff --git a/django/contrib/sites/managers.py b/django/contrib/sites/managers.py
new file mode 100644
index 0000000000..fb698f22e1
--- /dev/null
+++ b/django/contrib/sites/managers.py
@@ -0,0 +1,11 @@
+from django.db import models
+from django.conf import settings
+
+class CurrentSiteManager(models.Manager):
+    "Use this to limit objects to those associated with the current site."
+    def __init__(self, field_name='site')
+        super(SiteLimitManager, self).__init__()
+        self.__lookup = field_name + '__id__exact'
+
+    def get_query_set(self):
+        return super(SiteLimitManager, self).get_query_set().filter(self.__lookup=settings.SITE_ID)