diff --git a/admin_manual/configuration_server/config_sample_php_parameters.rst b/admin_manual/configuration_server/config_sample_php_parameters.rst
index 8e438347b..0db9ae820 100644
--- a/admin_manual/configuration_server/config_sample_php_parameters.rst
+++ b/admin_manual/configuration_server/config_sample_php_parameters.rst
@@ -841,7 +841,9 @@ Defaults to ``false``
 	'updatechecker' => true,
 
 Check if Nextcloud is up-to-date and shows a notification if a new version is
-available.
+available. It sends current version, php version, installation and last update
+time and release channel to the updater server which responds with the latest
+available version based on those metrics.
 
 Defaults to ``true``