Get granted roles with psql

With psql, there is an easy way to check which roles are granted to a role: \du

henk=> CREATE ROLE accounting;
CREATE ROLE
henk=> CREATE ROLE alex;
CREATE ROLE
henk=> GRANT accounting TO alex;
GRANT ROLE

henk=> \du accounting
             List of roles
 Role name  |  Attributes  | Member of
------------+--------------+-----------
 accounting | Cannot login | {}

henk=> \du alex
              List of roles
 Role name |  Attributes  |  Member of
-----------+--------------+--------------
 alex      |              | {accounting}