diff --git a/src/alsa.conf b/src/alsa.conf
index d6d262b3..8ecc0e32 100644
--- a/src/alsa.conf
+++ b/src/alsa.conf
@@ -29,6 +29,8 @@ defaults.pcm.surround40.card defaults.pcm.card
 defaults.pcm.surround40.device defaults.pcm.device
 defaults.pcm.surround51.card defaults.pcm.card
 defaults.pcm.surround51.device defaults.pcm.device
+defaults.pcm.iec958.card defaults.pcm.device
+defaults.pcm.iec958.device defaults.pcm.device
 defaults.rawmidi.card 0
 defaults.rawmidi.device 0
 defaults.rawmidi.subdevice -1