diff --git a/libao2/ao_alsa.c b/libao2/ao_alsa.c
index db23f1b532..2c2abd64d9 100644
--- a/libao2/ao_alsa.c
+++ b/libao2/ao_alsa.c
@@ -310,7 +310,7 @@ static int init(int rate_hz, int channels, int format, int flags)
 	break;
 
       default:
-	alsa_format = SND_PCM_FORMAT_MPEG2; //? default should be -1
+	alsa_format = SND_PCM_FORMAT_MPEG; //? default should be -1
 	break;
       }