diff --git a/src/Drivers/PdoMysql/PdoMysqlDriver.php b/src/Drivers/PdoMysql/PdoMysqlDriver.php
index 5ccc55db..df87b43f 100644
--- a/src/Drivers/PdoMysql/PdoMysqlDriver.php
+++ b/src/Drivers/PdoMysql/PdoMysqlDriver.php
@@ -59,7 +59,7 @@
  */
 class PdoMysqlDriver extends PdoDriver
 {
-	private ?PdoMysqlResultNormalizerFactory $resultNormalizerFactory = null;
+	protected ?PdoMysqlResultNormalizerFactory $resultNormalizerFactory = null;
 
 
 	public function connect(array $params, ILogger $logger): void