diff --git a/files/lib/data/user/User.class.php b/files/lib/data/user/User.class.php
index 88486d8..26ed3e9 100644
--- a/files/lib/data/user/User.class.php
+++ b/files/lib/data/user/User.class.php
@@ -75,10 +75,8 @@ class User extends DatabaseObjectDecorator implements \JsonSerializable
 
     /**
      * Returns whether the user is in the given room.
-     *
-     * @return  boolean
      */
-    public function isInRoom(Room $room, $skipCache = false)
+    public function isInRoom(Room $room, $skipCache = false): bool
     {
         $assoc = $this->getRoomAssociations($skipCache);