diff --git a/lib/http.js b/lib/http.js
index 0ce9dc2..dc19fbf 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -279,9 +279,11 @@ var HTTPObject = function(engine) {
     };
 
     this.open = function(method, url) {
+        var url = this.serializeParameters(url);
+
         this.setMethod(method.toUpperCase());   // set method
         this.setHeader("User-Agent", (this.userAgent != null ? this.userAgent : ''));   // set user agent
-        this.pushState(null, null, this.serializeParameters(url));   // push state
+        this.pushState(null, null, url);   // push state
 
         try {
             if (this.engine == "MSXML") {