diff --git a/libraries/src/Application/WebApplication.php b/libraries/src/Application/WebApplication.php
index 21a6c21bfde21..38c1e828e0902 100644
--- a/libraries/src/Application/WebApplication.php
+++ b/libraries/src/Application/WebApplication.php
@@ -182,7 +182,8 @@ class WebApplication extends BaseApplication
 		'x-content-type-options',
 		'referrer-policy',
 		'expect-ct',
-		'feature-policy',
+		'feature-policy', // @deprecated - see: https://scotthelme.co.uk/goodbye-feature-policy-and-hello-permissions-policy/
+		'permissions-policy',
 	);
 
 	/**