diff --git a/functions/ftp.xml b/functions/ftp.xml
index 4543ed92e2..31635901c4 100644
--- a/functions/ftp.xml
+++ b/functions/ftp.xml
@@ -412,6 +412,29 @@
    </refsect1>
   </refentry>
 
+  <refentry id="function.ftp-site">
+   <refnamediv>
+    <refname>ftp_site</refname>
+    <refpurpose>Sends a SITE command to the server.</refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcdef>int <function>ftp_site</function></funcdef>
+     <paramdef>int <parameter>ftp_stream</parameter></paramdef>
+     <paramdef>string <parameter>cmd</parameter></paramdef>
+    </funcsynopsis>
+    <para>
+     Returns true on success, false on error.</para>
+    <para>
+     <function>ftp_site</function> sends the command specified by
+     <parameter>cmd</parameter> to the FTP server.  SITE commands
+     are not standardized, and vary from server to server.  They are
+     useful for handling such things as file permissions and group
+     membership. </para>
+   </refsect1>
+  </refentry>
+
   <refentry id="function.ftp-quit">
    <refnamediv>
     <refname>ftp_quit</refname>