diff --git a/lib/XMLHttpRequest.js b/lib/XMLHttpRequest.js
index 4893913..50302d9 100644
--- a/lib/XMLHttpRequest.js
+++ b/lib/XMLHttpRequest.js
@@ -109,6 +109,7 @@ exports.XMLHttpRequest = function() {
   // Result & response
   this.responseText = "";
   this.responseXML = "";
+  this.response = Buffer.alloc(0);
   this.status = null;
   this.statusText = null;
   
@@ -434,6 +435,7 @@ exports.XMLHttpRequest = function() {
           // Make sure there's some data
           if (chunk) {
             self.responseText += chunk;
+            self.response = Buffer.concat([self.response, chunk]);
           }
           // Don't emit state changes if the connection has been aborted.
           if (sendFlag) {