diff --git a/std/tray.c b/std/tray.c
index 5cda3f4..e5f05b3 100644
--- a/std/tray.c
+++ b/std/tray.c
@@ -25,6 +25,7 @@
 inherit "/std/container/restrictions";
 inherit "/std/tray/description";
 inherit "/std/thing/envchk";
+inherit "/std/container/items";
 
 #include <properties.h>
 #include <wizlevels.h>