diff --git a/lib/Twitter.js b/lib/Twitter.js
index 17b4a17..2405168 100644
--- a/lib/Twitter.js
+++ b/lib/Twitter.js
@@ -183,8 +183,7 @@ Twitter.prototype.getCustomApiCall = function (url, params, error, success) {
 };
 
 Twitter.prototype.postCustomApiCall = function (url, params, error, success) {
-    var path =  url + this.buildQS(params);
-    var url = this.baseUrl + path;
+    var url = this.baseUrl + url;
     this.doPost(url, params, error, success);
 };