1 files changed, 3 insertions, 0 deletions

diff --git a/core/strings.php b/core/strings.php
index f59b5c8265a..fa23fb1ac65 100644
--- a/core/strings.php
+++ b/core/strings.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *