Dump of table structure is not consistent

Hi,

\d my.table is showing me the primary key as:
"unitstat_pkey" PRIMARY KEY, btree (id)

But the looking into the table structure produced by
pg_dump -s -n my -t table db

I'm getting gthe primary key shown as:
ADD CONSTRAINT unistat_pkey PRIMARY KEY (id);

That has been the name of it, but I altered it executing:
ALTER TABLE unistat_pkey RENAME TO unitstat_pkey

How can I make the dump consistent ?
PostgreSQL 8.1.9 on i486-pc-linux-gnu, compiled by GCC gcc-4.0.gcc-opt
(GCC) 4.0.3 (Ubuntu 4.0.3-1ubuntu5)

Poul