diff --git a/lib/private/SystemConfig.php b/lib/private/SystemConfig.php
index f63663fbfe3fd..013ff7748b4b4 100644
--- a/lib/private/SystemConfig.php
+++ b/lib/private/SystemConfig.php
@@ -54,6 +54,7 @@ class SystemConfig {
 		'passwordsalt' => true,
 		'secret' => true,
 		'updater.secret' => true,
+	    'updater.server.url' => true,
 		'trusted_proxies' => true,
 		'preview_imaginary_url' => true,
 		'proxyuserpwd' => true,