diff --git a/django/contrib/sessions/backends/db.py b/django/contrib/sessions/backends/db.py
index 3328cc8cb7..9a537905a7 100644
--- a/django/contrib/sessions/backends/db.py
+++ b/django/contrib/sessions/backends/db.py
@@ -1,11 +1,11 @@
 import datetime
 from django.conf import settings
-from django.contrib.sessions.models import Session
 from django.contrib.sessions.backends.base import SessionBase, CreateError
 from django.core.exceptions import SuspiciousOperation
 from django.db import IntegrityError, transaction, router
 from django.utils.encoding import force_unicode
 
+
 class SessionStore(SessionBase):
     """
     Implements database session store.
@@ -76,3 +76,7 @@ class SessionStore(SessionBase):
             Session.objects.get(session_key=session_key).delete()
         except Session.DoesNotExist:
             pass
+
+
+# At bottom to avoid circular import
+from django.contrib.sessions.models import Session
diff --git a/django/contrib/sessions/models.py b/django/contrib/sessions/models.py
index f438707e40..1d82a9929b 100644
--- a/django/contrib/sessions/models.py
+++ b/django/contrib/sessions/models.py
@@ -4,6 +4,7 @@ import cPickle as pickle
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
+
 class SessionManager(models.Manager):
     def encode(self, session_dict):
         """
@@ -51,4 +52,6 @@ class Session(models.Model):
     def get_decoded(self):
         return SessionStore().decode(self.session_data)
 
+
+# At bottom to avoid circular import
 from django.contrib.sessions.backends.db import SessionStore