diff --git a/inc/js/classes/BxDolUploader.js b/inc/js/classes/BxDolUploader.js
index 918fe89015..136be8eaa5 100644
--- a/inc/js/classes/BxDolUploader.js
+++ b/inc/js/classes/BxDolUploader.js
@@ -382,6 +382,7 @@ BxDolUploaderBase.prototype.getMimeTypefromString  = function (ext) {
         'movie'  : 'video/x-sgi-movie',
         'mp2'    : 'audio/mpeg',
         'mp3'    : 'audio/mpeg',
+        'm4a'    : 'audio/mp4',
         'mp4'    : 'video/mp4',  
         'm4v'    : 'video/mp4', 
         'mpa'    : 'video/mpeg',