diff --git a/models/oauth_accesstoken.js b/models/oauth_accesstoken.js
index fda6055..957b370 100644
--- a/models/oauth_accesstoken.js
+++ b/models/oauth_accesstoken.js
@@ -19,7 +19,7 @@ module.exports.getAccessToken = function(bearerToken, callback) {
 module.exports.saveAccessToken = function(token, clientId, expires, userId, callback) {
   var fields = {
     clientId: clientId,
-    userId: userId.id,
+    userId: (!userId.id ? userId : userId.id),
     expires: expires
   };