diff --git a/lib/transports/xhr-multipart.js b/lib/transports/xhr-multipart.js
index 69dbf92b..d75ca133 100644
--- a/lib/transports/xhr-multipart.js
+++ b/lib/transports/xhr-multipart.js
@@ -5,6 +5,7 @@ io.Transport['xhr-multipart'] = io.Transport.XHR.extend({
   connect: function(){
     var self = this;
     this._xhr = this._request('', 'GET');
+		this._xhr.multipart = true;
     this._xhr.onreadystatechange = function(){
       if (self._xhr.readyState == 3) self._onData(self._xhr.responseText);
       else if (self._xhr.status == 200 && self._xhr.readyState == 4) self.connect();