diff --git a/doc/src/sgml/advanced.sgml b/doc/src/sgml/advanced.sgml
index 11859b4..218988e 100644
*** a/doc/src/sgml/advanced.sgml
--- b/doc/src/sgml/advanced.sgml
*************** SELECT depname, empno, salary, avg(salar
*** 383,392 ****
     </para>
  
     <para>
!     Although <function>avg</> will produce the same result no matter
!     what order it processes the partition's rows in, this is not true of all
!     window functions.  When needed, you can control that order using
!     <literal>ORDER BY</> within <literal>OVER</>.  Here is an example:
  
  <programlisting>
  SELECT depname, empno, salary, rank() OVER (PARTITION BY depname ORDER BY salary DESC) FROM empsalary;
--- 383,392 ----
     </para>
  
     <para>
!     You can also control the order in which rows are processed by
!     window functions using <literal>ORDER BY</> within <literal>OVER</>.
!     (The window <literal>ORDER BY</> does not even have to match the
!     order in which the rows are output.)  Here is an example:
  
  <programlisting>
  SELECT depname, empno, salary, rank() OVER (PARTITION BY depname ORDER BY salary DESC) FROM empsalary;