diff --git a/endpoints/index.py b/endpoints/index.py
index 4aa3f8ec7..6ebec2d6c 100644
--- a/endpoints/index.py
+++ b/endpoints/index.py
@@ -432,4 +432,5 @@ def get_search():
 def ping():
   response = make_response('true', 200)
   response.headers['X-Docker-Registry-Version'] = '0.6.0'
+  response.headers['X-Docker-Registry-Standalone'] = '0'
   return response