diff --git a/lib/Event/LoadViewer.php b/lib/Event/LoadViewer.php
index fff290c35..66b590be2 100644
--- a/lib/Event/LoadViewer.php
+++ b/lib/Event/LoadViewer.php
@@ -26,5 +26,10 @@
 
 use OCP\EventDispatcher\Event;
 
+/**
+ * This event is triggered whenever the viewer is loaded and extensions should be loaded.
+ *
+ * @since 17.0.0
+ */
 class LoadViewer extends Event {
 }