diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
new file mode 100644
index e58dc18..1e2c033
*** a/doc/src/sgml/config.sgml
--- b/doc/src/sgml/config.sgml
*************** SET XML OPTION { DOCUMENT | CONTENT };
*** 5152,5160 ****
       </varlistentry>
  
       <varlistentry id="guc-timezone" xreflabel="timezone">
!       <term><varname>timezone</varname> (<type>string</type>)</term>
        <indexterm>
!        <primary><varname>timezone</> configuration parameter</primary>
        </indexterm>
        <indexterm><primary>time zone</></>
        <listitem>
--- 5152,5160 ----
       </varlistentry>
  
       <varlistentry id="guc-timezone" xreflabel="timezone">
!       <term><varname>TimeZone</varname> (<type>string</type>)</term>
        <indexterm>
!        <primary><varname>TimeZone</> configuration parameter</primary>
        </indexterm>
        <indexterm><primary>time zone</></>
        <listitem>