diff --git a/reference/pdo/functions/PDO-construct.xml b/reference/pdo/functions/PDO-construct.xml
index 5597e5461f..4c3641f89a 100644
--- a/reference/pdo/functions/PDO-construct.xml
+++ b/reference/pdo/functions/PDO-construct.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='iso-8859-1'?>
-<!-- $Revision: 1.10 $ -->
+<!-- $Revision: 1.11 $ -->
   <refentry id="function.PDO-construct">
    <refnamediv>
     <refname>PDO::__construct</refname>
@@ -133,6 +133,11 @@
              <literal>pdo.dsn.<parameter>name</parameter></literal> in &php.ini;
              defining the DSN string.
             </para>
+            <note>
+             <para>
+              The alias must be defined in &php.ini;, and not &htaccess; or &httpd.conf;
+             </para>
+            </note>
            </listitem>
           </varlistentry>
          </variablelist>