diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index f03a3e1ee4..8d8483d92a 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -565,6 +565,7 @@ class acp_board
 					'site_home_text',
 					'board_index_text',
 					'board_disable_msg',
+					'board_email_sig',
 				];
 
 				/**