diff --git a/doc/src/sgml/ref/alter_domain.sgml b/doc/src/sgml/ref/alter_domain.sgml
new file mode 100644
index f738b29..ac9a5b3
*** a/doc/src/sgml/ref/alter_domain.sgml
--- b/doc/src/sgml/ref/alter_domain.sgml
*************** ALTER DOMAIN <replaceable class="PARAMET
*** 271,279 ****
    <title>Notes</title>
  
    <para>
!    Currently, <command>ALTER DOMAIN ADD CONSTRAINT</> and
!    <command>ALTER DOMAIN SET NOT NULL</> will fail if the validated named
!    domain or
     any derived domain is used within a composite-type column of any
     table in the database.  They should eventually be improved to be
     able to verify the new constraint for such nested columns.
--- 271,279 ----
    <title>Notes</title>
  
    <para>
!    Currently, <command>ALTER DOMAIN ADD CONSTRAINT</>, <command>ALTER
!    DOMAIN VALIDATE CONSTRAINT</>, and <command>ALTER DOMAIN SET NOT NULL</>
!    will fail if the validated named domain or
     any derived domain is used within a composite-type column of any
     table in the database.  They should eventually be improved to be
     able to verify the new constraint for such nested columns.