diff --git a/phpBB/includes/acp/acp_language.php b/phpBB/includes/acp/acp_language.php
index defc811e8b..97a20131b0 100644
--- a/phpBB/includes/acp/acp_language.php
+++ b/phpBB/includes/acp/acp_language.php
@@ -32,7 +32,6 @@ use phpbb\user;
 class acp_language
 {
 	var $u_action;
-	var $main_files;
 
 	var $language_file = '';
 	var $language_directory = '';