diff --git a/lib/plugins/config/settings/config.class.php b/lib/plugins/config/settings/config.class.php
index 427178c40f62b295f7403d84c44b232fac6f21ad..ec5f73fa5bbaf0e84da03ba843a76edec1e8c929 100644
--- a/lib/plugins/config/settings/config.class.php
+++ b/lib/plugins/config/settings/config.class.php
@@ -659,10 +659,8 @@ if (!class_exists('setting_password')) {
 }
 
 if (!class_exists('setting_email')) {
-  if (!defined('SETTING_EMAIL_PATTERN')) define('SETTING_EMAIL_PATTERN','<^'.PREG_PATTERN_VALID_EMAIL.'$>');
 
   class setting_email extends setting_string {
-    var $_pattern = SETTING_EMAIL_PATTERN;       // no longer required, retained for backward compatibility - FIXME, may not be necessary
     var $_multiple = false;
     var $_placeholders = false;