diff --git a/cloudkitty/api/hooks.py b/cloudkitty/api/hooks.py
index 1ba03773..de4421b7 100644
--- a/cloudkitty/api/hooks.py
+++ b/cloudkitty/api/hooks.py
@@ -46,7 +46,7 @@ class ContextHook(hooks.PecanHook):
         is_admin = policy.check_is_admin(roles)
 
         creds = {
-            'user': headers.get('X-User-Id', ''),
+            'user_id': headers.get('X-User-Id', ''),
             'tenant': headers.get('X-Tenant-Id', ''),
             'auth_token': headers.get('X-Auth-Token', ''),
             'is_admin': is_admin,