diff --git a/rest_framework/authtoken/models.py b/rest_framework/authtoken/models.py
index ad4334b19..f24e1f3cc 100644
--- a/rest_framework/authtoken/models.py
+++ b/rest_framework/authtoken/models.py
@@ -41,7 +41,7 @@ class Token(models.Model):
 
 class TokenProxy(Token):
     """
-    Proxy mapping pk to user pk for use in admin.
+    Proxy mapping pk to user_id for use in admin.
     """
     @property
     def pk(self):