diff --git a/endpoints/registry.py b/endpoints/registry.py
index 27c98d44e..e232b4c67 100644
--- a/endpoints/registry.py
+++ b/endpoints/registry.py
@@ -2,7 +2,7 @@ import logging
 import json
 
 from flask import (make_response, request, session, Response, redirect,
-                   Blueprint)
+                   Blueprint, abort as flask_abort)
 from functools import wraps
 from datetime import datetime
 from time import time
@@ -255,7 +255,7 @@ def get_image_json(namespace, repository, image_id, headers):
     data = store.get_content(store.image_json_path(namespace, repository,
                                                    image_id))
   except IOError:
-    abort(404, 'Image %(image_id)%s not found', issue='unknown-image', image_id=image_id)
+    flask_abort(404)
 
   try:
     size = store.get_size(store.image_layer_path(namespace, repository,