diff --git a/libavformat/mpc.c b/libavformat/mpc.c
index 8abc488553..c3faebe6c0 100644
--- a/libavformat/mpc.c
+++ b/libavformat/mpc.c
@@ -95,9 +95,8 @@ static int mpc_read_header(AVFormatContext *s)
     st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
     st->codec->bits_per_coded_sample = 16;
 
-    if (ff_alloc_extradata(st->codec, 16))
+    if (ff_get_extradata(st->codec, s->pb, 16) < 0)
         return AVERROR(ENOMEM);
-    avio_read(s->pb, st->codec->extradata, 16);
     st->codec->sample_rate = mpc_rate[st->codec->extradata[2] & 3];
     avpriv_set_pts_info(st, 32, MPC_FRAMESIZE, st->codec->sample_rate);
     /* scan for seekpoints */