diff --git a/phpBB/includes/acp/acp_users.php b/phpBB/includes/acp/acp_users.php
index 205ce20bc3..f775d7954b 100644
--- a/phpBB/includes/acp/acp_users.php
+++ b/phpBB/includes/acp/acp_users.php
@@ -2085,6 +2085,17 @@ class acp_users
 							'user_sig_bbcode_bitfield'	=> $bbcode_bitfield,
 						);
 
+						/**
+						* Modify user signature before it is stored in the DB
+						*
+						* @event core.acp_users_modify_signature_sql_ary
+						* @var	array	user_row	Array with user data
+						* @var	array	sql_ary		Array with user signature data to be updated in the DB
+						* @since 3.2.4-RC1
+						*/
+						$vars = array('user_row', 'sql_ary');
+						extract($phpbb_dispatcher->trigger_event('core.acp_users_modify_signature_sql_ary', compact($vars)));
+
 						$sql = 'UPDATE ' . USERS_TABLE . '
 							SET ' . $db->sql_build_array('UPDATE', $sql_ary) . '
 							WHERE user_id = ' . $user_id;