diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 5b6e94df99..02530b5986 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -589,6 +589,7 @@ class acp_board
 					'site_home_text',
 					'board_index_text',
 					'board_disable_msg',
+					'board_email_sig',
 				];
 
 				/**