diff --git a/lib/swagger-oauth.js b/lib/swagger-oauth.js
index 85459c5b..c2fb9b96 100644
--- a/lib/swagger-oauth.js
+++ b/lib/swagger-oauth.js
@@ -130,7 +130,7 @@ function handleLogin() {
      * @return the name of the access token parameter
      */
     function getTokenName(dets) {
-        return dets['x-tokenName'] || dets.tokenName;
+        return dets.vendorExtensions['x-tokenName'] || dets.tokenName;
     }
 
     for (var key in authSchemes) {