diff --git a/apps/files_versions/lib/Listener/FileEventsListener.php b/apps/files_versions/lib/Listener/FileEventsListener.php
index 17d22619c075d..5fe41f76e492e 100644
--- a/apps/files_versions/lib/Listener/FileEventsListener.php
+++ b/apps/files_versions/lib/Listener/FileEventsListener.php
@@ -63,8 +63,17 @@
 use Psr\Log\LoggerInterface;
 
 class FileEventsListener implements IEventListener {
+	/**
+	 * @var array<int, array>
+	 */
 	private array $writeHookInfo = [];
+	/**
+	 * @var array<int, Node>
+	 */
 	private array $nodesTouched = [];
+	/**
+	 * @var array<string, Node>
+	 */
 	private array $versionsDeleted = [];
 
 	public function __construct(