diff --git a/reference/dio/functions/dio-fcntl.xml b/reference/dio/functions/dio-fcntl.xml
index f7ed91e31e..5971d50ad6 100644
--- a/reference/dio/functions/dio-fcntl.xml
+++ b/reference/dio/functions/dio-fcntl.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/dio.xml, last change in rev 1.1 -->
   <refentry id="function.dio-fcntl">
    <refnamediv>
@@ -82,6 +82,13 @@
         them.
        </para>
       </listitem>
+      <listitem>
+       <para>
+        F_SETFL - Sets the file descriptors flags to the value specified by  
+	<parameter>arg</parameter>, Which can be O_APPEND,O_NONBLOCK or 
+	O_ASYNC . To use O_ASYNC you will need to use the pcntl extension.
+       </para>
+      </listitem>
      </itemizedlist>
     </para>
    </refsect1>