diff --git a/audio/include/system/audio.h b/audio/include/system/audio.h
index 7fb2261..f51476d 100644
--- a/audio/include/system/audio.h
+++ b/audio/include/system/audio.h
@@ -211,6 +211,7 @@
     FCC_1 = 1,
     FCC_2 = 2,
     FCC_8 = 8,
+    FCC_24 = 24,
 };
 
 /* A channel mask per se only defines the presence or absence of a channel, not the order.