Enums documentation "glitch"

In "CREATE TYPE" documentation, we see the following paragraph:

"Enumerated Types

The second form of CREATE TYPE creates an enumerated (enum) type, as
described in Section 8.7
<http://www.postgresql.org/docs/9.1/static/datatype-enum.html>. Enum
types take a list of one or more quoted labels, each of which must be
less than NAMEDATALEN bytes long (64 in a standard PostgreSQL build)."

In section 8.7 we find a conflicting statement (ok, is just 1 character,
but still):

"8.7.4. Implementation Details

An enum value occupies four bytes on disk. The length of an enum value's
textual label is limited by the NAMEDATALEN setting compiled into
PostgreSQL; in standard builds this means at most 63 bytes."

What is the correct one: 63 or 64 bytes?

--

*Edson Carlos Ericksson Richter*
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