pg-relcheck error

I've installed v7.3.2 from your RedHat 7.3 RPM on a Linux 7.x system. I create a table:

create table EN(
rec_id char( 2 ) check( rec_id = 'EN' ),
...
);

and then do in psql:

xxx> \d EN
ERROR: Relation "pg_relcheck" does not exist

This error happens on all tables that I define (all have the same type of constraint).

This worked fine in v7.0.2.