Create table LIKE another including Primary key...

Is there some way to use SQL to create a table LIKE another including the
primary key?

This doesn't work
CREATE TABLE mytbl2
LIKE mytbl1
PRIMARY KEY (mykey);

The manual seems to imply it's possible with a copy option...
"The implicit definition does not include any other optional attributes of
the identified table or view. For example, the new table does not
automatically include primary keys, foreign keys, or triggers. The new
table has these and other optional attributes only if the optional clauses
are explicitly specified."

But I don't see any copy option that mentions primary keys...

CRTDUPOBJ and CPYF are not options as the table being copied has a long
name.

Of course I can ALTER TABLE to add the primary key, but it'd be nice to
know if there was a way to include the primary key from the get-go.

Thanks!