diff --git a/audio/out/ao_alsa.c b/audio/out/ao_alsa.c
index 651efb6a3a..a828bcd96b 100644
--- a/audio/out/ao_alsa.c
+++ b/audio/out/ao_alsa.c
@@ -608,7 +608,8 @@ static int init(struct ao *ao)
 
         err = snd_pcm_set_chmap(p->alsa, alsa_chmap);
         if (err == -ENXIO) {
-            MP_WARN(ao, "Device does not support requested channel map\n");
+            MP_WARN(ao, "Device does not support requested channel map (%s)\n",
+                    mp_chmap_to_str(&dev_chmap));
         } else {
             CHECK_ALSA_WARN("Channel map setup failed");
         }