diff --git a/phpBB/includes/constants.php b/phpBB/includes/constants.php
index 265d4794b6..3614586e31 100644
--- a/phpBB/includes/constants.php
+++ b/phpBB/includes/constants.php
@@ -67,6 +67,7 @@ define(LOGIN_FAILED, 7);
 define(PRIVMSGS_READ_MAIL, 0);
 define(PRIVMSGS_NEW_MAIL, 1);
 define(PRIVMSGS_SENT_MAIL, 2);
+define(PRIVMSGS_SAVED_MAIL, 3);
 
 // URL PARAMETERS
 define(POST_TOPIC_URL, 't');