diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index 5bd54cb218..bd70116b90 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -12278,10 +12278,11 @@ SELECT * FROM pg_locks pl LEFT JOIN pg_prepared_xacts ppx
   </para>
 
   <para>
-   The <structname>pg_settings</structname> view cannot be inserted into or
-   deleted from, but it can be updated.  An <command>UPDATE</command> applied
-   to a row of <structname>pg_settings</structname> is equivalent to executing
-   the <command>SET</command> command on that named
+   The <structname>pg_settings</structname> view does not display
+   <link linkend="runtime-config-custom">customized options</link>.
+   It cannot be inserted into or deleted from, but it can be updated.
+   An <command>UPDATE</command> applied to a row of <structname>pg_settings</structname>
+   is equivalent to executing the <command>SET</command> command on that named
    parameter. The change only affects the value used by the current
    session. If an <command>UPDATE</command> is issued within a transaction
    that is later aborted, the effects of the <command>UPDATE</command> command