diff --git a/fftools/ffplay.c b/fftools/ffplay.c
index d8c69e10bc..5bf2070a8d 100644
--- a/fftools/ffplay.c
+++ b/fftools/ffplay.c
@@ -1999,6 +1999,8 @@ static int configure_audio_filters(VideoState *is, const char *afilters, int for
         goto end;
 
     if (force_output_format) {
+        av_bprint_clear(&bp);
+        av_channel_layout_describe_bprint(&is->audio_tgt.ch_layout, &bp);
         sample_rates   [0] = is->audio_tgt.freq;
         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
             goto end;