diff --git a/database.sql b/database.sql
index daf65d7c8..e2a0f243a 100644
--- a/database.sql
+++ b/database.sql
@@ -641,8 +641,8 @@ CREATE TABLE IF NOT EXISTS `item` (
 	`uri-id` int unsigned COMMENT 'Id of the item-uri table entry that contains the item uri',
 	`uri-hash` varchar(80) NOT NULL DEFAULT '' COMMENT 'RIPEMD-128 hash from uri',
 	`parent` int unsigned NOT NULL DEFAULT 0 COMMENT 'item.id of the parent to this item if it is a reply of some form; otherwise this must be set to the id of this item',
-	`parent-uri` varchar(255) NOT NULL DEFAULT '' COMMENT 'uri of the parent to this item',
-	`parent-uri-id` int unsigned COMMENT 'Id of the item-uri table that contains the parent uri',
+	`parent-uri` varchar(255) NOT NULL DEFAULT '' COMMENT 'uri of the top-level parent to this item',
+	`parent-uri-id` int unsigned COMMENT 'Id of the item-uri table that contains the top-level parent uri',
 	`thr-parent` varchar(255) NOT NULL DEFAULT '' COMMENT 'If the parent of this item is not the top-level item in the conversation, the uri of the immediate parent; otherwise set to parent-uri',
 	`thr-parent-id` int unsigned COMMENT 'Id of the item-uri table that contains the thread parent uri',
 	`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Creation timestamp.',