diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 8a9d7a8..8564a31 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -2341,7 +2341,6 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
     case AV_CODEC_ID_GSM_MS:       return  320;
     case AV_CODEC_ID_MP1:          return  384;
     case AV_CODEC_ID_ATRAC1:       return  512;
-    case AV_CODEC_ID_ATRAC3:       return 1024;
     case AV_CODEC_ID_MP2:
     case AV_CODEC_ID_MUSEPACK7:    return 1152;
     case AV_CODEC_ID_AC3:          return 1536;