diff --git a/libavformat/nut.c b/libavformat/nut.c
index 65fadbfa474361c569f8a611a604a9096125c020..196e04e54fa3d757cf643acf936360b3fd39fd05 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -145,6 +145,7 @@ const AVCodecTag ff_nut_audio_tags[] = {
     { AV_CODEC_ID_PCM_U32LE,        MKTAG('P', 'U', 'D', 32 ) },
     { AV_CODEC_ID_PCM_U8,           MKTAG('P', 'U', 'D',  8 ) },
     { AV_CODEC_ID_PCM_S16LE_PLANAR, MKTAG('P', 'S', 'P', 16 ) },
+    { AV_CODEC_ID_MP3,              MKTAG('M', 'P', '3', ' ') },
     { AV_CODEC_ID_NONE,             0                         }
 };
 
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 190504cc7963cc7da446567f8cd0aab1d1f3f046..fde11317fe62acf47f5dd2aadb63f4e2b9f3c260 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -348,7 +348,6 @@ const AVCodecTag ff_codec_wav_tags[] = {
     // for NuppelVideo (nuv.c)
     { AV_CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
     { AV_CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
-    { AV_CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
     { AV_CODEC_ID_NONE,      0 },
 };