diff --git a/lib/User.php b/lib/User.php
index 453e68f..bd228ff 100644
--- a/lib/User.php
+++ b/lib/User.php
@@ -93,10 +93,10 @@ class User extends DbMapping
                             NoticeID,
                             CheckOutDate,
                             ItemNr
-                        FROM %s AS c, Items
+                        FROM %s AS c
+                        INNER JOIN Items AS i ON i.ItemId = c.ItemId
                         WHERE
                             c.UseraccountId = %s
-                            AND Items.ItemId=c.ItemId
                         ORDER BY %s", $table, $this->id, $sort);
 
         $result = Connection::execute($sql);