diff --git a/lib/api.js b/lib/api.js
index d78da35..39d2a4e 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -1,3 +1,4 @@
+var error=require('./error.js')
 exports.api = Api;
 
 function Api(_super) {
@@ -36,4 +37,4 @@ Api.prototype.getProfile = function getProfile(accessToken, callback) {
 
     self._super.callApiMethod('user/profile', null, accessToken, callback);
   });
-};
\ No newline at end of file
+};