diff --git a/database.sql b/database.sql
index 48c2e7ecee..79e81f1d22 100644
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 3.6-dev (Asparagus)
--- DB_UPDATE_VERSION 1239
+-- DB_UPDATE_VERSION 1241
 -- ------------------------------------------
 
 
@@ -650,9 +650,10 @@ CREATE TABLE IF NOT EXISTS `notify-threads` (
 --
 CREATE TABLE IF NOT EXISTS `oembed` (
 	`url` varbinary(255) NOT NULL,
+	`maxwidth` int(11) NOT NULL,
 	`content` mediumtext,
 	`created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00',
-	 PRIMARY KEY(`url`),
+	 PRIMARY KEY(`url`,`maxwidth`),
 	 INDEX `created` (`created`)
 ) DEFAULT COLLATE utf8mb4_general_ci;
 
@@ -669,6 +670,16 @@ CREATE TABLE IF NOT EXISTS `parsed_url` (
 	 INDEX `created` (`created`)
 ) DEFAULT COLLATE utf8mb4_general_ci;
 
+--
+-- TABLE participation
+--
+CREATE TABLE IF NOT EXISTS `participation` (
+	`iid` int(10) unsigned NOT NULL,
+	`server` varchar(60) NOT NULL,
+	`cid` int(10) unsigned NOT NULL,
+	 PRIMARY KEY(`iid`,`server`)
+) DEFAULT COLLATE utf8mb4_general_ci;
+
 --
 -- TABLE pconfig
 --
diff --git a/src/Database/DBStructure.php b/src/Database/DBStructure.php
index 6ceeb573fe..2d9b4fc13b 100644
--- a/src/Database/DBStructure.php
+++ b/src/Database/DBStructure.php
@@ -1301,12 +1301,12 @@ class DBStructure {
 				);
 		$database["participation"] = array(
 				"fields" => array(
-						"item" => array("type" => "int(10) unsigned", "not null" => "1", "primary" => "1", "relation" => array("item" => "id")),
-						"contact" => array("type" => "int(10) unsigned", "not null" => "1", "relation" => array("contact" => "id")),
+						"iid" => array("type" => "int(10) unsigned", "not null" => "1", "primary" => "1", "relation" => array("item" => "id")),
 						"server" => array("type" => "varchar(60)", "not null" => "1", "primary" => "1"),
+						"cid" => array("type" => "int(10) unsigned", "not null" => "1", "relation" => array("contact" => "id")),
 						),
 				"indexes" => array(
-						"PRIMARY" => array("item", "server")
+						"PRIMARY" => array("iid", "server")
 						)
 				);
 		$database["pconfig"] = array(
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 747a1b2e1f..b2a4389058 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -115,9 +115,9 @@ class Diaspora
 	{
 		$r = dba::p("SELECT `contact`.`batch`, `contact`.`id`, `contact`.`name`, `contact`.`network`,
 				`fcontact`.`batch` AS `fbatch`, `fcontact`.`network` AS `fnetwork` FROM `participation`
-				INNER JOIN `contact` ON `contact`.`id` = `participation`.`contact`
+				INNER JOIN `contact` ON `contact`.`id` = `participation`.`cid`
 				LEFT JOIN `fcontact` ON `fcontact`.`url` = `contact`.`url`
-				WHERE `participation`.`item` = ?", $thread);
+				WHERE `participation`.`iid` = ?", $thread);
 
 		while ($contact = dba::fetch($r)) {
 			if (!empty($contact['fnetwork'])) {