diff --git a/rest_framework/authtoken/models.py b/rest_framework/authtoken/models.py
index 10c3e6236..5c83c7cd1 100644
--- a/rest_framework/authtoken/models.py
+++ b/rest_framework/authtoken/models.py
@@ -1,6 +1,7 @@
 import binascii
 import os
 
+from django.conf import settings
 from django.contrib.auth.models import User
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible