diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 3ff19da274..91874fa14e 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -175,7 +175,7 @@ static int mp3_write_xing(AVFormatContext *s)
         return -1;
     }
 
-    switch (par->channels) {
+    switch (par->ch_layout.nb_channels) {
     case 1:  channels = MPA_MONO;                                          break;
     case 2:  channels = MPA_STEREO;                                        break;
     default: av_log(s, AV_LOG_WARNING, "Unsupported number of channels, "