diff --git a/phpBB/install/database_update.php b/phpBB/install/database_update.php
index b6298ca651..6088a58fc4 100644
--- a/phpBB/install/database_update.php
+++ b/phpBB/install/database_update.php
@@ -2041,7 +2041,7 @@ function change_database_data(&$no_updates, $version)
 						'ON'	=> 'p.msg_id = t.msg_id',
 					),
 				),
-				'WHERE'		=> 't.user_id IS NULL';
+				'WHERE'		=> 't.user_id IS NULL');
 			$sql = $db->sql_build_query('SELECT', $sql_array);
 
 			do