<para>
The second form of <command>CREATE TYPE</command> creates an enumerated
(enum) type, as described in <xref linkend="datatype-enum">.
- Enum types take a list of one or more quoted labels, each of which
+ Enum types take a list of quoted labels, each of which
must be less than <symbol>NAMEDATALEN</symbol> bytes long (64 bytes in a
- standard <productname>PostgreSQL</productname> build).
+ standard <productname>PostgreSQL</productname> build). (It is possible to
+ create an enumerated type with zero labels, but such a type cannot be used
+ to hold values before at least one label is added using <xref
+ linkend="sql-altertype">.)
</para>
</refsect2>