diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
index 414e578094183..d2280bacd3a6b 100644
--- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php
+++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
@@ -76,7 +76,7 @@ public function setCallback($callback)
      */
     public function prepare(Request $request)
     {
-        if ('1.0' != $request->server->get('SERVER_PROTOCOL')) {
+        if ('HTTP 1.0' != $request->server->get('SERVER_PROTOCOL')) {
             $this->setProtocolVersion('1.1');
         }