diff --git a/filter/mediaplugin/lang/en/filter_mediaplugin.php b/filter/mediaplugin/lang/en/filter_mediaplugin.php
index 5729301e58796..de7e98e34d0cd 100644
--- a/filter/mediaplugin/lang/en/filter_mediaplugin.php
+++ b/filter/mediaplugin/lang/en/filter_mediaplugin.php
@@ -30,11 +30,11 @@
 $string['flashvideo'] = 'Flash video';
 $string['flashvideo_help'] = 'Files with extension *.flv and *.f4v. Plays video clips using Flowplayer, requires Flash plugin and javascript. Uses HTML 5 video fallback if multiple sources psecified.';
 $string['html5audio'] = 'HTML 5 audio';
-$string['html5audio_help'] = 'Audio files with extension *.ogg, *.acc and others. It is compatible with latest web browsers only, unfortunately there is no format that is supported by all browsers.
-Workaround is to specify fallbacks separated with # (ex: http://example.org/audio.acc#http://example.org/audio.acc#http://example.org/audio.mp3#), QuickTime player is used as a fallback for old browsers, fallback can be any audio type.';
+$string['html5audio_help'] = 'Audio files with extension *.ogg, *.aac and others. It is compatible with latest web browsers only, unfortunately there is no format that is supported by all browsers.
+Workaround is to specify fallbacks separated with # (ex: http://example.org/audio.aac#http://example.org/audio.aac#http://example.org/audio.mp3#), QuickTime player is used as a fallback for old browsers, fallback can be any audio type.';
 $string['html5video'] = 'HTML 5 video';
 $string['html5video_help'] = 'Video files with extension *.webm, *.m4v, *.ogv, *.mp4 and others. It is compatible with latest web browsers only, unfortunately there is no format that is supported by all browsers.
-Workaround is to specify fallbacks sources separated with # (ex: http://example.org/video.m4v#http://example.org/video.acc#http://example.org/video.ogv#d=640x480), QuickTime player is used as a fallback for old browsers.';
+Workaround is to specify fallbacks sources separated with # (ex: http://example.org/video.m4v#http://example.org/video.aac#http://example.org/video.ogv#d=640x480), QuickTime player is used as a fallback for old browsers.';
 $string['mp3audio'] = 'MP3 audio';
 $string['mp3audio_help'] = 'Files with extension *.mp3. Plays audio using Flowplayer, requires Flash plugin.';
 $string['legacyquicktime'] = 'QuickTime player';
diff --git a/filter/mediaplugin/styles.css b/filter/mediaplugin/styles.css
index 7048fdfa08907..bb39c835d6ed3 100644
--- a/filter/mediaplugin/styles.css
+++ b/filter/mediaplugin/styles.css
@@ -1,7 +1,7 @@
 /**
  * Filters
  */
-.mediaplugin_html5video, .mediaplugin_swf, .mediaplugin_flv, .mediaplugin_real, .mediaplugin_youtube, .mediaplugin_vimeo, .mediaplugin_wmp, .mediaplugin_qt
+.mediaplugin_html5audio, .mediaplugin_html5video, .mediaplugin_swf, .mediaplugin_flv, .mediaplugin_real, .mediaplugin_youtube, .mediaplugin_vimeo, .mediaplugin_wmp, .mediaplugin_qt
     {display:block;margin-top:5px;margin-bottom:5px;text-align: center;}
 .mediaplugin.mediaplugin_mp3 object {display:inline;height:15px;width:180px;margin-left:0.5em;}
 
diff --git a/lib/filestorage/file_types.mm b/lib/filestorage/file_types.mm
index 841fce7e774e2..64a12bbc9166e 100644
--- a/lib/filestorage/file_types.mm
+++ b/lib/filestorage/file_types.mm
@@ -19,6 +19,7 @@
 <node ID="_Freemind_Link_313976796" TEXT=".ra"/>
 <node ID="_Freemind_Link_709595453" TEXT=".wma"/>
 <node TEXT=".ogg"/>
+<node ID="ID_421461117" TEXT=".aac"/>
 </node>
 <node ID="_Freemind_Link_1800832653" TEXT="non_web_audio">
 <node ID="_Freemind_Link_1772266185" TEXT=".ape"/>