diff --git a/resources/lang/pl_PL/config.php b/resources/lang/pl_PL/config.php
index 3ccba5874d..1e88ed4078 100644
--- a/resources/lang/pl_PL/config.php
+++ b/resources/lang/pl_PL/config.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types=1);
+
 /**
  * config.php
  * Copyright (C) 2016 thegrumpydictator@gmail.com