diff --git a/phpBB/phpbb/db/migration/data/v400/remove_jabber.php b/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
index b82fdfc8db..12759f5f47 100644
--- a/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
+++ b/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
@@ -101,7 +101,7 @@ class remove_jabber extends migration
 		];
 	}
 
-	public function move_jabber_to_email_notifications(?int $start)
+	public function move_jabber_to_email_notifications(int|null $start)
 	{
 		$limit = 1000;