diff --git a/system/src/Grav/Common/Grav.php b/system/src/Grav/Common/Grav.php
index 606f06c0a..07d548d75 100644
--- a/system/src/Grav/Common/Grav.php
+++ b/system/src/Grav/Common/Grav.php
@@ -194,7 +194,6 @@ class Grav extends Container
         /** @var Uri $uri */
         $uri = $this['uri'];
         header('Content-type: ' . $this->mime($uri->extension()));
-        header('Content-length: ' . strlen($this->output));
     }
 
     /**