diff --git a/extensions/subscriptions/src/Notification/FilterVisiblePostsBeforeSending.php b/extensions/subscriptions/src/Notification/FilterVisiblePostsBeforeSending.php
index 818c8e9d59..b913d91937 100644
--- a/extensions/subscriptions/src/Notification/FilterVisiblePostsBeforeSending.php
+++ b/extensions/subscriptions/src/Notification/FilterVisiblePostsBeforeSending.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\Subscriptions\Notification;
 
 use Flarum\Notification\Blueprint\BlueprintInterface;