问mysql 问题 ？

MariaDB [sqdc]> create table area( id int auto_increment primary key unsigned)engine=InnoDB default charset=utf8;

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 'unsigned)engine=InnoDB default charset=utf8' at line 1

哪里不对，求高手指点。。