diff --git a/resources/lang/pl_PL/list.php b/resources/lang/pl_PL/list.php
index 0ce37d9346..c8b2e9d464 100644
--- a/resources/lang/pl_PL/list.php
+++ b/resources/lang/pl_PL/list.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * list.php
  * Copyright (C) 2016 thegrumpydictator@gmail.com