diff --git a/phpBB/includes/ucp/ucp_register.php b/phpBB/includes/ucp/ucp_register.php
index babedd4f12..8359c223e0 100644
--- a/phpBB/includes/ucp/ucp_register.php
+++ b/phpBB/includes/ucp/ucp_register.php
@@ -68,6 +68,7 @@ class ucp_register
 
 				$user->lang_name = $user_lang = $use_lang;
 				$user->lang = array();
+				$user->data['user_lang'] = $user->lang_name;
 				$user->add_lang(array('common', 'ucp'));
 			}
 			else