diff --git a/install/sql/mysql.sql b/install/sql/mysql.sql
index 6a0054210..f912da240 100644
--- a/install/sql/mysql.sql
+++ b/install/sql/mysql.sql
@@ -414,7 +414,7 @@ DROP TABLE IF EXISTS `bb_bt_users`;
 CREATE TABLE IF NOT EXISTS `bb_bt_users`
 (
   `user_id`              MEDIUMINT(9)          NOT NULL DEFAULT '0',
-  `auth_key`             CHAR(10)
+  `auth_key`             CHAR(20)
                            CHARACTER SET utf8
                              COLLATE utf8_bin  NOT NULL DEFAULT '',
   `u_up_total`           BIGINT(20) UNSIGNED   NOT NULL DEFAULT '0',