diff --git a/typo3/sysext/core/Configuration/DefaultConfiguration.php b/typo3/sysext/core/Configuration/DefaultConfiguration.php
index 9d5121991f8aece4e083efc3e9b1cc72512c33f7..735205e34854a60090f966dbe8a735f4f84aef34 100644
--- a/typo3/sysext/core/Configuration/DefaultConfiguration.php
+++ b/typo3/sysext/core/Configuration/DefaultConfiguration.php
@@ -1427,6 +1427,7 @@ return [
                 // Piwik
                 'pk_campaign',
                 'pk_kwd',
+                '_stg_debug',
                 // Google
                 'utm_source',
                 'utm_medium',