diff --git a/src/formats.c b/src/formats.c
index 9628c83e..35e4012b 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -197,6 +197,7 @@ static const char* extension_list[] = {
     "mpdsp",
     "mpds",
     "msa",
+    "msd",
     "msf",
     "mss",
     "msvp",
diff --git a/src/meta/mp4.c b/src/meta/mp4.c
index ee8e56c7..b232319a 100644
--- a/src/meta/mp4.c
+++ b/src/meta/mp4.c
@@ -181,8 +181,9 @@ VGMSTREAM * init_vgmstream_mp4_aac_ffmpeg(STREAMFILE *streamFile) {
 
 
     /* check extension, case insensitive */
-    /*  .bin: Final Fantasy Dimensions (iOS), Final Fantasy V (iOS) */
-    if (!check_extensions(streamFile,"mp4,m4a,m4v,lmp4,bin"))
+    /*  .bin: Final Fantasy Dimensions (iOS), Final Fantasy V (iOS)
+     *  .msd: UNO (iOS)  */
+    if (!check_extensions(streamFile,"mp4,m4a,m4v,lmp4,bin,msd"))
         goto fail;
 
     filesize = streamFile->get_size(streamFile);