diff --git a/login/models.py b/login/models.py
index d40fb5f0dc9f53188588504932f7bb90db7c77bc..5177edba9836d8637f31f3d36e0e58aad68bc448 100644
--- a/login/models.py
+++ b/login/models.py
@@ -46,9 +46,7 @@ class User(db.Model):
         }
 
         # Relabel field names
-        for field in mapping:
-            old_field_name = field[0]
-            new_field_name = field[1]
+        for old_field_name, new_field_name in mapping:
             token[new_field_name] = token[old_field_name]
             del token[old_field_name]