Can't use SHUTDOWN in stored programs

MariaDB [(none)]> DELIMITER ||

MariaDB [(none)]> DROP EVENT IF EXISTS `test`.`evt_shutdown`;

    -> CREATE EVENT `test`.`evt_shutdown`

    ->  ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 20 SECOND

    ->  ON COMPLETION PRESERVE

    ->  ENABLE

    -> DO BEGIN

    ->  SHUTDOWN;

    -> END;

    -> ||

Query OK, 0 rows affected, 1 warning (0.06 sec)

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that

corresponds to your MariaDB server version for the right syntax to use near ';

END' at line 6

MariaDB [(none)]>

MariaDB [(none)]>

MariaDB [(none)]>

MariaDB [(none)]>

MariaDB [(none)]> SHUTDOWN;

    -> ||

Query OK, 0 rows affected (4.68 sec)