diff --git a/phpBB/install/database_update.php b/phpBB/install/database_update.php
index fec09f89db..a5457c722f 100644
--- a/phpBB/install/database_update.php
+++ b/phpBB/install/database_update.php
@@ -1795,6 +1795,9 @@ function change_database_data(&$no_updates, $version)
 			// Sync the forums we have deleted shadow topics from.
 			sync('forum', 'forum_id', $sync_forum_ids, true, true);
 
+			// Unread posts search load switch
+			set_config('load_unreads_search', '1');
+
 			$no_updates = false;
 		break;
 	}
diff --git a/phpBB/install/schemas/schema_data.sql b/phpBB/install/schemas/schema_data.sql
index e815615eef..a25b68ba39 100644
--- a/phpBB/install/schemas/schema_data.sql
+++ b/phpBB/install/schemas/schema_data.sql
@@ -168,6 +168,7 @@ INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_online_time',
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_onlinetrack', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_search', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_tplcompile', '0');
+INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_unreads_search', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('load_user_activity', '1');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('max_attachments', '3');
 INSERT INTO phpbb_config (config_name, config_value) VALUES ('max_attachments_pm', '1');