get error when set X-FRAME-OPTIONS in Apache HTTP Server 2.2
<p>Got below issue when I trying to add below code into httpd.conf file tail:</p>

<pre><code>#iframe config
Header always append X-Frame-Options ALLOW-FROM http://xxxx
</code></pre>

<blockquote>
  <p>Syntax error on line 489 of C:/Program Files (x86)/Apache Software
  Foundation/Ap ache2.2/conf/httpd.conf: Invalid command 'Header',
  perhaps misspelled or defined by a module not included  in the server
  configuration</p>
</blockquote>