diff --git a/database.sql b/database.sql
index bcd8c9843..f4bbebf08 100644
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 2020.06-dev (Red Hot Poker)
--- DB_UPDATE_VERSION 1350
+-- DB_UPDATE_VERSION 1351
 -- ------------------------------------------
 
 
@@ -1237,6 +1237,7 @@ CREATE TABLE IF NOT EXISTS `storage` (
 --
 CREATE TABLE IF NOT EXISTS `thread` (
 	`iid` int unsigned NOT NULL DEFAULT 0 COMMENT 'sequential ID',
+	`uri-id` int unsigned COMMENT 'Id of the item-uri table entry that contains the item uri',
 	`uid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
 	`contact-id` int unsigned NOT NULL DEFAULT 0 COMMENT '',
 	`owner-id` int unsigned NOT NULL DEFAULT 0 COMMENT 'Item owner',
@@ -1272,7 +1273,9 @@ CREATE TABLE IF NOT EXISTS `thread` (
 	 INDEX `uid_received` (`uid`,`received`),
 	 INDEX `uid_commented` (`uid`,`commented`),
 	 INDEX `uid_wall_received` (`uid`,`wall`,`received`),
-	 INDEX `private_wall_origin_commented` (`private`,`wall`,`origin`,`commented`)
+	 INDEX `private_wall_origin_commented` (`private`,`wall`,`origin`,`commented`),
+	 INDEX `uri-id` (`uri-id`),
+	FOREIGN KEY (`uri-id`) REFERENCES `item-uri` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Thread related data';
 
 --
diff --git a/src/Model/Item.php b/src/Model/Item.php
index a6036e6bd..f014ed096 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -3110,7 +3110,7 @@ class Item
 	private static function addThread($itemid, $onlyshadow = false)
 	{
 		$fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
-			'moderated', 'visible', 'starred', 'contact-id', 'post-type',
+			'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
 			'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
 		$condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
 		$item = self::selectFirst($fields, $condition);
@@ -3131,7 +3131,7 @@ class Item
 	private static function updateThread($itemid, $setmention = false)
 	{
 		$fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
-			'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
+			'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
 			'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
 		$condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
 
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index fc7abded5..9fccdf14b 100755
--- a/static/dbstructure.config.php
+++ b/static/dbstructure.config.php
@@ -54,7 +54,7 @@
 use Friendica\Database\DBA;
 
 if (!defined('DB_UPDATE_VERSION')) {
-	define('DB_UPDATE_VERSION', 1350);
+	define('DB_UPDATE_VERSION', 1351);
 }
 
 return [
@@ -1343,6 +1343,7 @@ return [
 		"fields" => [
 			"iid" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "primary" => "1", "relation" => ["item" => "id"],
 				"comment" => "sequential ID"],
+			"uri-id" => ["type" => "int unsigned", "foreign" => ["item-uri" => "id"], "comment" => "Id of the item-uri table entry that contains the item uri"],
 			"uid" => ["type" => "mediumint unsigned", "not null" => "1", "default" => "0", "relation" => ["user" => "uid"], "comment" => "User id"],
 			"contact-id" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "relation" => ["contact" => "id"], "comment" => ""],
 			"owner-id" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "relation" => ["contact" => "id"], "comment" => "Item owner"],
@@ -1381,6 +1382,7 @@ return [
 			"uid_commented" => ["uid", "commented"],
 			"uid_wall_received" => ["uid", "wall", "received"],
 			"private_wall_origin_commented" => ["private", "wall", "origin", "commented"],
+			"uri-id" => ["uri-id"],
 		]
 	],
 	"tokens" => [
diff --git a/tests/datasets/api.fixture.php b/tests/datasets/api.fixture.php
index 8713b1ff3..54d4f4d3c 100644
--- a/tests/datasets/api.fixture.php
+++ b/tests/datasets/api.fixture.php
@@ -268,6 +268,7 @@ return [
 	'thread'  => [
 		[
 			'iid'        => 1,
+			'uri-id'     => 1,
 			'visible'    => 1,
 			'contact-id' => 42,
 			'author-id'  => 42,
@@ -277,6 +278,7 @@ return [
 		],
 		[
 			'iid'        => 3,
+			'uri-id'     => 3,
 			'visible'    => 1,
 			'contact-id' => 43,
 			'author-id'  => 43,
@@ -286,6 +288,7 @@ return [
 		],
 		[
 			'iid'        => 6,
+			'uri-id'     => 6,
 			'visible'    => 1,
 			'contact-id' => 44,
 			'author-id'  => 44,
diff --git a/update.php b/update.php
index 48d44813b..acbb458f7 100644
--- a/update.php
+++ b/update.php
@@ -498,4 +498,13 @@ function update_1349()
 	}
 
 	return Update::SUCCESS;
-}
\ No newline at end of file
+}
+
+function update_1351()
+{
+	if (!DBA::e("UPDATE `thread` INNER JOIN `item` ON `thread`.`iid` = `item`.`id` SET `thread`.`uri-id` = `item`.`uri-id`")) {
+		return Update::FAILED;
+	}
+
+	return Update::SUCCESS;
+}