diff --git a/system/application/config/mimes.php b/system/application/config/mimes.php
index 225b0a5..a8addb9 100644
--- a/system/application/config/mimes.php
+++ b/system/application/config/mimes.php
@@ -30,7 +30,7 @@
 				'smil'	=>	'application/smil',
 				'mif'	=>	'application/vnd.mif',
 				'xls'	=>	array('application/excel', 'application/vnd.ms-excel'),
-				'ppt'	=>	'application/powerpoint',
+				'ppt'	=>	array('application/powerpoint', 'application/vnd.ms-powerpoint'),
 				'wbxml'	=>	'application/wbxml',
 				'wmlc'	=>	'application/wmlc',
 				'dcr'	=>	'application/x-director',
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index bb155ea..e93088c 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -62,7 +62,9 @@
 <p>Release Date: not currently released</p>
 <ul>
     <li>No additions currently listed</li>
-    </ul>
+    <li>Added 'application/vnd.ms-powerpoint' to list of mime types.<br />
+    </li>
+</ul>
 <h3>Bugfixes for 1.6.2</h3>
 <ul>
     <li>Fixed assorted user guide typos (#3453)</li>