diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index a34987a7dc..a920eb7c8f 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -6664,7 +6664,7 @@ AVOutputFormat ff_ipod_muxer = {
     .name              = "ipod",
     .long_name         = NULL_IF_CONFIG_SMALL("iPod H.264 MP4 (MPEG-4 Part 14)"),
     .mime_type         = "video/mp4",
-    .extensions        = "m4v,m4a",
+    .extensions        = "m4v,m4a,m4b",
     .priv_data_size    = sizeof(MOVMuxContext),
     .audio_codec       = AV_CODEC_ID_AAC,
     .video_codec       = AV_CODEC_ID_H264,