diff --git a/doc/src/sgml/release-8.4.sgml b/doc/src/sgml/release-8.4.sgml
index f426023..f76c446 100644
*** a/doc/src/sgml/release-8.4.sgml
--- b/doc/src/sgml/release-8.4.sgml
*************** WITH w AS (SELECT * FROM foo) SELECT * F
*** 2556,2561 ****
--- 2556,2576 ----
        </para>
       </listitem>
  
+      <listitem>
+       <para>
+       The following deprecated functions have been removed: 
+       <function>istrue()</>, <function>isfalse()</>, 
+       <function>isnottrue()</>, <function>isnotfalse()</>, 
+       <function>nullvalue()</>, <function>nonnullvalue()</>. (Peter Eisentraut)
+      </para>
+ 
+      <para>
+       If your client code depends on these functions, you can either implement
+       trivial replacements with SQL-language functions, or change your client
+       code to use <literal>IS TRUE</>, <literal>IS FALSE</>, 
+       <literal>IS NULL</>, <literal>IS NOT NULL</>, etc.
+      </para>
+ 
      </itemizedlist>
  
      <sect4>