diff --git a/phpBB/includes/ucp/ucp_register.php b/phpBB/includes/ucp/ucp_register.php
index 3c5f4e2826..bba721901a 100644
--- a/phpBB/includes/ucp/ucp_register.php
+++ b/phpBB/includes/ucp/ucp_register.php
@@ -481,6 +481,32 @@ class ucp_register
 						);
 					}
 
+					/**
+					* Modify messenger data before welcome mail is sent
+					*
+					* @event core.ucp_register_welcome_email_before
+					* @var	array		user_row	Array with user registration data
+					* @var	array		cp_data		Array with custom profile fields data
+					* @var	array		data		Array with current ucp registration data
+					* @var	string		message		Message to be displayed to the user after registration
+					* @var	string		server_url	Server URL
+					* @var	int			user_id		New user ID
+					* @var	string		user_actkey	User activation key
+					* @var	messenger	messenger	phpBB Messenger
+					* @since 3.2.4-RC1
+					*/
+					$vars = array(
+						'user_row',
+						'cp_data',
+						'data',
+						'message',
+						'server_url',
+						'user_id',
+						'user_actkey',
+						'messenger',
+					);
+					extract($phpbb_dispatcher->trigger_event('core.ucp_register_welcome_email_before', compact($vars)));
+
 					$messenger->send(NOTIFY_EMAIL);
 				}