diff --git a/doc/src/sgml/ref/alter_domain.sgml b/doc/src/sgml/ref/alter_domain.sgml
new file mode 100644
index db7b819..d65d517
*** a/doc/src/sgml/ref/alter_domain.sgml
--- b/doc/src/sgml/ref/alter_domain.sgml
*************** ALTER DOMAIN <replaceable class="PARAMET
*** 272,278 ****
  
    <para>
     Currently, <command>ALTER DOMAIN ADD CONSTRAINT</> and
!    <command>ALTER DOMAIN SET NOT NULL</> will fail if the 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.
--- 272,279 ----
  
    <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.