diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index a98a377235..4aabc0da23 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -126,6 +126,7 @@ class Response
         100 => 'Continue',
         101 => 'Switching Protocols',
         102 => 'Processing',            // RFC2518
+        103 => 'Early Hints',
         200 => 'OK',
         201 => 'Created',
         202 => 'Accepted',