diff --git a/endpoints/api/discovery.py b/endpoints/api/discovery.py
index b23cf9e23..0b66c41aa 100644
--- a/endpoints/api/discovery.py
+++ b/endpoints/api/discovery.py
@@ -157,7 +157,7 @@ def swagger_route_data(include_internal=False, compact=False):
           "implicit": {
             "tokenName": "access_token",
             "loginEndpoint": {
-              "url": "http://localhost:5000/oauth/authorize",
+              "url": "http://%s/oauth/authorize" % app.config['URL_HOST'],
             },
           },
         },