diff --git a/lib/models/user.js b/lib/models/user.js
index f7e114d3..48a15eea 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -136,7 +136,8 @@ var User = module.exports = Model.extend('User', properties, options);
  * @param {AccessToken} token The generated access token object
  */
 User.prototype.createAccessToken = function(ttl, cb) {
-  ttl = Math.min(ttl || User.settings.ttl, User.settings.maxTTL);
+  var userModel = this.constructor;
+  ttl = Math.min(ttl || userModel.settings.ttl, userModel.settings.maxTTL);
   this.accessTokens.create({
     ttl: ttl
   }, cb);