diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
new file mode 100644
index 3a7cfa9..7e5bcd9
*** a/doc/src/sgml/func.sgml
--- b/doc/src/sgml/func.sgml
*************** SELECT SUBSTRING('XY1234Z', 'Y*?([0-9]{1
*** 5781,5787 ****
  
       <listitem>
        <para>
!        <literal>TM</literal> does not include trailing blanks.
        </para>
       </listitem>
  
--- 5781,5789 ----
  
       <listitem>
        <para>
!        <literal>TM</literal> does not include trailing blanks. 
!        <function>to_timestamp</> and <function>to_date</> ignore
!        the <literal>TM</literal> modifier.
        </para>
       </listitem>