diff --git a/ChangeLog b/ChangeLog
index d47656d49..91ed35420 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -45,6 +45,7 @@ $HeadURL: https://phpmyadmin.svn.sourceforge.net/svnroot/phpmyadmin/trunk/phpMyA
 + [querywindow] tweaks in sql history view
 + [export] Native Excel (Spreadsheet_Excel_Writer) improvements,
    thanks to Christian Schmidt 
++ [doc] requirement of mcrypt on 64-bit, thanks to Isaac Bennetch 
 
 2.10.1.0 (not released yet)
 =====================
diff --git a/Documentation.html b/Documentation.html
index 0725bf0db..3418f13a2 100644
--- a/Documentation.html
+++ b/Documentation.html
@@ -65,13 +65,16 @@
                 original aspect ratio</li>
             <li>You need PHP 4.3.0 or newer to use the
                 &quot;text/plain: external&quot;  MIME-based transformation</li>
+            <li>When using the &quot;cookie&quot;
+                <a href="#authentication_modes">authentication method</a>, the
+                <a href="http://www.php.net/mcrypt"><tt>mcrypt</tt></a> extension
+                is strongly suggested for most users and is <b>required</b> for
+                64&#8211;bit machines. Not using mcrypt will cause phpMyAdmin to
+                load pages significantly slower.
+            </li>
         </ul>
     </li>
     <li><b>MySQL</b> 3.23.32 or newer (<a href="#faq1_17">details</a>);</li>
-    <li>Not really a requirement but a <b>strong suggestion</b>: if you are using
-        the &quot;cookie&quot; authentication method, having the <tt>mcrypt</tt>
-        PHP extension on your web server accelerates not only the login
-        phase but every other action that you do in phpMyAdmin.</li>
     <li><b>Web browser</b> with cookies enabled.</li>
 </ul>