diff --git a/libavformat/riff.c b/libavformat/riff.c
index 4328dde..effc8d6 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -742,6 +742,9 @@ int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
     /* override bits_per_coded_sample for G.726 */
     if (codec->codec_id == AV_CODEC_ID_ADPCM_G726 && codec->sample_rate)
         codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
+        
+    if (codec->codec_id == AV_CODEC_ID_ATRAC3)
+        codec->bits_per_coded_sample = 16;
 
     return 0;
 }