diff --git a/lib/oauth.js b/lib/oauth.js
index c831254..840cedd 100644
--- a/lib/oauth.js
+++ b/lib/oauth.js
@@ -277,7 +277,7 @@ module.exports = new Model({
         console.log(error);
         this._deleteBearerToken();
         return null;
-      });
+      }.bind(this));
   },
 
   _saveRedirectUri: function(redirectUri) {