diff --git a/src/mod_http_upload.erl b/src/mod_http_upload.erl
index cd897f0a5..e9dc9cff7 100644
--- a/src/mod_http_upload.erl
+++ b/src/mod_http_upload.erl
@@ -43,6 +43,7 @@
 	 {<<".gz">>, <<"application/x-gzip">>},
 	 {<<".jpeg">>, <<"image/jpeg">>},
 	 {<<".jpg">>, <<"image/jpeg">>},
+	 {<<".m4a">>, <<"audio/mp4">>},
 	 {<<".mp3">>, <<"audio/mpeg">>},
 	 {<<".mp4">>, <<"video/mp4">>},
 	 {<<".mpeg">>, <<"video/mpeg">>},