diff --git a/phpBB/install/convertors/convert_phpbb20.php b/phpBB/install/convertors/convert_phpbb20.php
index 0f17f0e2fe..14ad45004d 100644
--- a/phpBB/install/convertors/convert_phpbb20.php
+++ b/phpBB/install/convertors/convert_phpbb20.php
@@ -103,10 +103,10 @@ $config_schema = array(
 		'allow_avatar_remote'	=> 'allow_avatar_remote',
 		'allow_avatar_upload'	=> 'allow_avatar_upload',
 		'board_disable'			=> 'board_disable',
-		'sitename'				=> 'sitename',
-		'site_desc'				=> 'site_desc',
+		'sitename'				=> 'phpbb_set_encoding(sitename)',
+		'site_desc'				=> 'phpbb_set_encoding(site_desc)',
 		'session_length'		=> 'session_length',
-		'board_email_sig'		=> 'board_email_sig',
+		'board_email_sig'		=> 'phpbb_set_encoding(board_email_sig)',
 		'posts_per_page'		=> 'posts_per_page',
 		'topics_per_page'		=> 'topics_per_page',
 		'enable_confirm'		=> 'enable_confirm',