diff --git a/libavformat/sdr2.c b/libavformat/sdr2.c
index 6799339420..3023d5f7d1 100644
--- a/libavformat/sdr2.c
+++ b/libavformat/sdr2.c
@@ -54,7 +54,7 @@ static int sdr2_read_header(AVFormatContext *s)
     ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
 
     ast->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
-    ast->codecpar->channels    = 1;
+    ast->codecpar->ch_layout.nb_channels = 1;
     ast->codecpar->sample_rate = 8000;
     ast->codecpar->codec_id    = AV_CODEC_ID_PCM_S16LE;
     avpriv_set_pts_info(ast, 64, 1, 8000);