diff --git a/libavformat/mp3dec.c b/libavformat/mp3dec.c
index 74b76e2501..e09d45a145 100644
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@@ -360,6 +360,6 @@ AVInputFormat ff_mp3_demuxer = {
     .read_seek      = mp3_seek,
     .priv_data_size = sizeof(MP3DecContext),
     .flags          = AVFMT_GENERIC_INDEX,
-    .extensions     = "mp2,mp3,m2a", /* XXX: use probe */
+    .extensions     = "mp2,mp3,m2a,mpa", /* XXX: use probe */
     .priv_class     = &demuxer_class,
 };
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index ee0956e8b9..185ac63255 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -385,7 +385,7 @@ AVOutputFormat ff_mp2_muxer = {
     .name              = "mp2",
     .long_name         = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"),
     .mime_type         = "audio/x-mpeg",
-    .extensions        = "mp2,m2a",
+    .extensions        = "mp2,m2a,mpa",
     .audio_codec       = AV_CODEC_ID_MP2,
     .video_codec       = AV_CODEC_ID_NONE,
     .write_packet      = ff_raw_write_packet,