diff --git a/typo3/sysext/core/Configuration/DefaultConfiguration.php b/typo3/sysext/core/Configuration/DefaultConfiguration.php
index 46b6f82b235be66a7ddbe1e5393642552ab60331..e9d3cb8618d75aade3943e457d13afdfb257f98c 100644
--- a/typo3/sysext/core/Configuration/DefaultConfiguration.php
+++ b/typo3/sysext/core/Configuration/DefaultConfiguration.php
@@ -1456,6 +1456,7 @@ return [
                 // Piwik
                 'pk_campaign',
                 'pk_kwd',
+                '_stg_debug',
                 // Google
                 'utm_source',
                 'utm_medium',