diff --git a/src/Control/HTTP.php b/src/Control/HTTP.php
index d8a3b7248c9..ff4eac12726 100644
--- a/src/Control/HTTP.php
+++ b/src/Control/HTTP.php
@@ -20,6 +20,7 @@ class HTTP
      * Set to true to disable all deprecated HTTP Cache settings
      *
      * @var bool
+     * @deprecated 5.4.0 Will be removed without equivalent functionality to replace it.
      */
     private static $ignoreDeprecatedCaching = false;