How not to display system tables?

Hi all!
Reading from man psql I see that the \d used without a pattern argument
is equivalent to \dtvs which will display all pga_* tables along with
the 'pure' data tables.
Is there a way to change this behaviour (apart than using a SELECT
relname from pg_class WHERE relkind = ...).
I tried \d !~pga* to no avail ;(
Regards,
      Ennio.

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