diff --git a/boot.php b/boot.php
index da72b16ef2..90d5c856e0 100644
--- a/boot.php
+++ b/boot.php
@@ -13,7 +13,7 @@ require_once('library/Mobile_Detect/Mobile_Detect.php');
 define ( 'FRIENDICA_PLATFORM',     'Friendica');
 define ( 'FRIENDICA_VERSION',      '3.0.1418' );
 define ( 'DFRN_PROTOCOL_VERSION',  '2.23'    );
-define ( 'DB_UPDATE_VERSION',      1154      );
+define ( 'DB_UPDATE_VERSION',      1155      );
 
 define ( 'EOL',                    "<br />\r\n"     );
 define ( 'ATOM_TIME',              'Y-m-d\TH:i:s\Z' );
diff --git a/update.php b/update.php
index 9442f825bb..789ff9f45d 100644
--- a/update.php
+++ b/update.php
@@ -1,6 +1,6 @@
 <?php
 
-define( 'UPDATE_VERSION' , 1154 );
+define( 'UPDATE_VERSION' , 1155 );
 
 /**
  *
@@ -1344,3 +1344,10 @@ function update_1153() {
 	return UPDATE_SUCCESS;
 }
 
+function update_1154() {
+	$r = q("UPDATE `item` SET `thr-parent`=`parent-uri` WHERE `id`!=`parent` AND `thr-parent`=''");
+	
+	if(!$r) return UPDATE_FAILED;
+	return UPDATE_SUCCESS;
+}
+