diff --git a/lib/filelib.php b/lib/filelib.php
index fd6b23dc129..3b2d4531fc8 100644
--- a/lib/filelib.php
+++ b/lib/filelib.php
@@ -1375,6 +1375,7 @@ function &get_mimetypes_array() {
         'xxx'  => array ('type'=>'document/unknown', 'icon'=>'unknown'),
         '3gp'  => array ('type'=>'video/quicktime', 'icon'=>'quicktime', 'groups'=>array('video'), 'string'=>'video'),
         'aac'  => array ('type'=>'audio/aac', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
+        'accdb'  => array ('type'=>'application/msaccess', 'icon'=>'base'),
         'ai'   => array ('type'=>'application/postscript', 'icon'=>'eps', 'groups'=>array('image'), 'string'=>'image'),
         'aif'  => array ('type'=>'audio/x-aiff', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
         'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
@@ -1438,6 +1439,7 @@ function &get_mimetypes_array() {
         'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text'),
         'm'    => array ('type'=>'text/plain', 'icon'=>'sourcecode'),
         'mbz'  => array ('type'=>'application/vnd.moodle.backup', 'icon'=>'moodle'),
+        'mdb'  => array ('type'=>'application/x-msaccess', 'icon'=>'base'),
         'mov'  => array ('type'=>'video/quicktime', 'icon'=>'quicktime', 'groups'=>array('video','web_video'), 'string'=>'video'),
         'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'quicktime', 'groups'=>array('video'), 'string'=>'video'),
         'm3u'  => array ('type'=>'audio/x-mpegurl', 'icon'=>'mp3', 'groups'=>array('audio'), 'string'=>'audio'),