From c927c3244261ca36dd341652e1791c069a16f01a Mon Sep 17 00:00:00 2001
From: Noah Hilverling <noah.hilverling@netways.de>
Date: Mon, 17 Oct 2016 16:34:07 +0200
Subject: [PATCH] Response: Only set header Content-Type in method prepare if
 not already set

refs #12161
---
 library/Icinga/Web/Response.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/Icinga/Web/Response.php b/library/Icinga/Web/Response.php
index cdb377efd..d96972de6 100644
--- a/library/Icinga/Web/Response.php
+++ b/library/Icinga/Web/Response.php
@@ -275,7 +275,7 @@ class Response extends Zend_Controller_Response_Http
             }
         }
 
-        $this->setHeader("Content-Type", $this->getContentType(), true);
+        $this->setHeader('Content-Type', $this->getContentType(), false);
     }
 
     /**