diff --git a/lib/XMLHttpRequest.js b/lib/XMLHttpRequest.js
index 949fdf9..4d0c9c1 100644
--- a/lib/XMLHttpRequest.js
+++ b/lib/XMLHttpRequest.js
@@ -393,6 +393,8 @@ exports.XMLHttpRequest = function() {
           var url = Url.parse(settings.url);
           // Set host var in case it's used later
           host = url.hostname;
+          // Fix host header
+          headers.Host = url.host;
           // Options for the new request
           var newOptions = {
             hostname: url.hostname,