diff --git a/lib/public/Calendar/ICalendar.php b/lib/public/Calendar/ICalendar.php
index 0d08e2ba268aa..d06ab299f6d60 100644
--- a/lib/public/Calendar/ICalendar.php
+++ b/lib/public/Calendar/ICalendar.php
@@ -40,6 +40,7 @@ interface ICalendar {
 	public function getKey();
 
 	/**
+	 * In comparison to getKey() this function returns a unique uri within the scope of the principal
 	 * @since 24.0.0
 	 */
 	public function getUri(): string;