diff --git a/reference/curl/functions/curl-setopt.xml b/reference/curl/functions/curl-setopt.xml
index 6479d74ebe..eaccfe0fc1 100644
--- a/reference/curl/functions/curl-setopt.xml
+++ b/reference/curl/functions/curl-setopt.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.40 $ -->
+<!-- $Revision: 1.41 $ -->
 <refentry xml:id="function.curl-setopt" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>curl_setopt</refname>
@@ -1332,6 +1332,18 @@ Array
   </para>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <note>
+   <para>
+    Passing an array to <entry><constant>CURLOPT_POST</constant></entry>
+    will encode the data as <emphasis>multipart/form-data</emphasis>,
+    while passing a URL-encoded string will encode the data as
+    <emphasis>application/x-www-form-urlencoded</emphasis>.
+   </para>
+  </note>
+ </refsect1>
+
  <refsect1 role="seealso">
   &reftitle.seealso;
   <para>