diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index d8c7126feea..10c124088be 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.177.2.4 2005/11/16 03:56:52 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.177.2.5 2006/10/01 18:54:57 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -5271,6 +5271,7 @@ date_trunc('<replaceable>field</replaceable>', <replaceable>source</replaceable>
      <member><literal>hour</literal></member>
      <member><literal>day</literal></member>
      <member><literal>month</literal></member>
+     <member><literal>quarter</literal></member>
      <member><literal>year</literal></member>
      <member><literal>decade</literal></member>
      <member><literal>century</literal></member>