diff --git a/reference/pgsql/functions/pg-last-oid.xml b/reference/pgsql/functions/pg-last-oid.xml
index 0649ad95c1..4665c7e296 100644
--- a/reference/pgsql/functions/pg-last-oid.xml
+++ b/reference/pgsql/functions/pg-last-oid.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.82 -->
   <refentry id="function.pg-last-oid">
    <refnamediv>
@@ -22,13 +22,20 @@
      <function>pg_query</function> was not an INSERT or INSERT is
      failed.
     </para>
+    <para>
+     OID field became an optional field from PostgreSQL 7.2. When 
+     OID field is not defined in a table, programmer must use 
+     <function>pg_result_status</function> to check if record is
+     is inserted successfully or not.
+    </para>
     <note>
      <para>
       This function used to be called <literal>pg_getlastoid()</literal>.
      </para>
     </note>
     <para>
-     See also <function>pg_query</function>.
+     See also <function>pg_query</function> and
+     <function>pg_result_status</function>
     </para>
    </refsect1>
   </refentry>