diff --git a/app/Http/Middleware/XssProtectHeader.php b/app/Http/Middleware/XssProtectHeader.php
index 45b9806802..868d100f37 100644
--- a/app/Http/Middleware/XssProtectHeader.php
+++ b/app/Http/Middleware/XssProtectHeader.php
@@ -14,7 +14,7 @@ class XssProtectHeader
      */
     public function handle($request, Closure $next)
     {
-        $mode = '1; mode=block';
+        $mode = '1;mode=block';
         $response = $next($request);
         $response->headers->set('X-XSS-Protection', $mode);
         return $response;