Accessing to a granted table. - Mailing list pgsql-sql

Hi all, I have two users in a postgresql database, one is called user1
and the other user2.
I have one table owned by the user1 which is called table1.
I have granted the table1 to be selected by the user2.
My question is: how can I access to table1 from the user2?

I have tried from user2: SELECT * FROM USER1.TABLE1 but it doesn't work.

Thanks in advance.
Roberto Pérez.