diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
index 503ccef7831d2..5684c3ceedf60 100644
--- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php
+++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
@@ -70,7 +70,6 @@ public function prepare(Request $request)
     {
         if ('1.0' != $request->server->get('SERVER_PROTOCOL')) {
             $this->setProtocolVersion('1.1');
-            $this->headers->set('Transfer-Encoding', 'chunked');
         }
 
         $this->headers->set('Cache-Control', 'no-cache');
diff --git a/tests/Symfony/Tests/Component/HttpFoundation/StreamedResponseTest.php b/tests/Symfony/Tests/Component/HttpFoundation/StreamedResponseTest.php
index 308a4651fb528..e58e844eec44f 100644
--- a/tests/Symfony/Tests/Component/HttpFoundation/StreamedResponseTest.php
+++ b/tests/Symfony/Tests/Component/HttpFoundation/StreamedResponseTest.php
@@ -33,7 +33,7 @@ public function testPrepareWith11Protocol()
         $response->prepare($request);
 
         $this->assertEquals('1.1', $response->getProtocolVersion());
-        $this->assertEquals('chunked', $response->headers->get('Transfer-Encoding'));
+        $this->assertNotEquals('chunked', $response->headers->get('Transfer-Encoding'), 'Apache assumes responses with a Transfer-Encoding header set to chunked to already be encoded.');
         $this->assertEquals('no-cache, private', $response->headers->get('Cache-Control'));
     }