diff --git a/phpBB/includes/search/fulltext_mysql.php b/phpBB/includes/search/fulltext_mysql.php
index 7c94038cc9..475706c158 100644
--- a/phpBB/includes/search/fulltext_mysql.php
+++ b/phpBB/includes/search/fulltext_mysql.php
@@ -748,7 +748,7 @@ class phpbb_search_fulltext_mysql extends phpbb_search_base
 		{
 			if ($db->sql_layer == 'mysqli' || version_compare($db->sql_server_info(true), '4.1.3', '>='))
 			{
-				//$alter[] = 'MODIFY post_subject varchar(100) COLLATE utf8_unicode_ci DEFAULT \'\' NOT NULL';
+				$alter[] = 'MODIFY post_subject varchar(255) COLLATE utf8_unicode_ci DEFAULT \'\' NOT NULL';
 			}
 			else
 			{