diff --git a/lib/adapters/xhr.js b/lib/adapters/xhr.js
index 7dc4cce..090f469 100644
--- a/lib/adapters/xhr.js
+++ b/lib/adapters/xhr.js
@@ -41,7 +41,7 @@ module.exports = function xhrAdapter(resolve, reject, config) {
 
   // Create the request
   var request = new adapter('Microsoft.XMLHTTP');
-  request.open(config.method.toUpperCase(), buildUrl(config.url, config.params, config.paramsSerializer), true);
+  request.open(config.method.toUpperCase(), buildURL(config.url, config.params, config.paramsSerializer), true);
 
   // Set the request timeout in MS
   request.timeout = config.timeout;