diff --git a/core/trunk/structure.sql b/core/trunk/structure.sql
index 5304f2e068559be10d083f6f12c1b2c4ab46ea88..9f9d1dd97e22d2939819a30830b4446a09fabbdc 100644
--- a/core/trunk/structure.sql
+++ b/core/trunk/structure.sql
@@ -817,6 +817,7 @@ CREATE TABLE listinstance
   item_mode character varying(50) NOT NULL,
   added_by_user character varying(128) NOT NULL,
   added_by_entity character varying(50) NOT NULL,
+  visible character varying(50) NOT NULL DEFAULT 'Y'::bpchar,
   viewed bigint,
   CONSTRAINT listinstance_pkey PRIMARY KEY (listinstance_id)
 )