diff --git a/files/helpers/media.py b/files/helpers/media.py
index f393e8eb9..361766a7c 100644
--- a/files/helpers/media.py
+++ b/files/helpers/media.py
@@ -81,7 +81,7 @@ def process_audio(file, v):
 	name_original = secure_filename(file.filename)
 	extension = name_original.split('.')[-1].lower()
 
-	if extension not in {'mp3','ogg','flac'}:
+	if extension not in {'mp3','ogg','flac','m4a'}:
 		extension = 'mp3'
 
 	new = old + '.' + extension