diff --git a/app/code/Magento/Developer/Console/Command/DiInfoCommand.php b/app/code/Magento/Developer/Console/Command/DiInfoCommand.php
index 81390d06df6b1..8c78af93106b2 100644
--- a/app/code/Magento/Developer/Console/Command/DiInfoCommand.php
+++ b/app/code/Magento/Developer/Console/Command/DiInfoCommand.php
@@ -3,6 +3,7 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 namespace Magento\Developer\Console\Command;