diff --git a/backend/src/apiserver/client_manager.go b/backend/src/apiserver/client_manager.go
index 0c8969ab700..489c0611f51 100644
--- a/backend/src/apiserver/client_manager.go
+++ b/backend/src/apiserver/client_manager.go
@@ -45,6 +45,7 @@ const (
 	mysqlPassword          = "DBConfig.Password"
 	mysqlDBName            = "DBConfig.DBName"
 	mysqlGroupConcatMaxLen = "DBConfig.GroupConcatMaxLen"
+	mysqlExtraParams       = "DBConfig.ExtraParams"
 	kfamServiceHost        = "KFAM_SERVICE_HOST"
 	kfamServicePort        = "KFAM_SERVICE_PORT"