diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index 77c90ba..3a3a714 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -38,6 +38,7 @@
         ALARM           = 4,
         NOTIFICATION    = 5,
         BLUETOOTH_SCO   = 6,
+        ENFORCED_AUDIBLE = 7, // Sounds that cannot be muted by user and must be routed to speaker
         NUM_STREAM_TYPES
     };