diff --git a/include/api.tickets.php b/include/api.tickets.php
index 60907d56e9edc3bd1694ca633094c4fadc34f40f..14bd9cbf877e5861465b8bb924f4038ae3f01105 100644
--- a/include/api.tickets.php
+++ b/include/api.tickets.php
@@ -12,7 +12,7 @@ class TicketApiController extends ApiController {
         $supported = array(
             "alert", "autorespond", "source", "topicId",
             "attachments" => array("*" =>
-                array("name", "type", "data", "encoding")
+                array("name", "type", "data", "encoding", "size")
             ),
             "message", "ip", "priorityId"
         );