diff --git a/lib/private/SystemConfig.php b/lib/private/SystemConfig.php
index c435b9180b97c..012c959ce8527 100644
--- a/lib/private/SystemConfig.php
+++ b/lib/private/SystemConfig.php
@@ -43,6 +43,10 @@ class SystemConfig {
 		'dbhost' => true,
 		'dbpassword' => true,
 		'dbuser' => true,
+		'activity_dbname' => true,
+		'activity_dbhost' => true,
+		'activity_dbpassword' => true,
+		'activity_dbuser' => true,
 		'mail_from_address' => true,
 		'mail_domain' => true,
 		'mail_smtphost' => true,