diff --git a/audio/fmt-conversion.c b/audio/fmt-conversion.c
index bb32361ce5..8a61a1c6b7 100644
--- a/audio/fmt-conversion.c
+++ b/audio/fmt-conversion.c
@@ -43,7 +43,7 @@ enum AVSampleFormat af_to_avformat(int fmt)
         if (audio_conversion_map[i].fmt == fmt)
             break;
     sample_fmt = audio_conversion_map[i].sample_fmt;
-    if (sample_fmt == AF_FORMAT_UNKNOWN)
+    if (sample_fmt == AV_SAMPLE_FMT_NONE)
         mp_msg(MSGT_GLOBAL, MSGL_V, "Unsupported sample format: %s\n",
                 af_fmt_to_str(fmt));
     return sample_fmt;