diff --git a/lib/XMLHttpRequest.js b/lib/XMLHttpRequest.js
index 183e8eb..e0f4071 100644
--- a/lib/XMLHttpRequest.js
+++ b/lib/XMLHttpRequest.js
@@ -15,7 +15,11 @@ var Url = require("url")
   , spawn = require("child_process").spawn
   , fs = require('fs');
 
-exports.XMLHttpRequest = function() {
+  /**
+   *
+   * @param http.Agent agent An http.Agent instance; http.globalAgent may be used; if 'undefined', agent usage is disabled; (optional)
+   */
+exports.XMLHttpRequest = function(agent) {
   /**
    * Private variables
    */
@@ -97,6 +101,8 @@ exports.XMLHttpRequest = function() {
    * Public vars
    */
 
+  this.agent = agent || false;
+
   // Current state
   this.readyState = this.UNSENT;
 
@@ -359,7 +365,7 @@ exports.XMLHttpRequest = function() {
       path: uri,
       method: settings.method,
       headers: headers,
-      agent: false
+      agent: this.agent
     };
 
     // Reset error flag