diff --git a/libavformat/ilbc.c b/libavformat/ilbc.c
index 0cbdd3d5b8..361116571f 100644
--- a/libavformat/ilbc.c
+++ b/libavformat/ilbc.c
@@ -75,7 +75,7 @@ static int ilbc_read_header(AVFormatContext *s)
         return AVERROR(ENOMEM);
     st->codecpar->codec_id = AV_CODEC_ID_ILBC;
     st->codecpar->sample_rate = 8000;
-    st->codecpar->channels = 1;
+    st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     st->start_time = 0;
     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);