diff --git a/include/hardware/audio.h b/include/hardware/audio.h
index 26e9ea9..4fd73a2 100644
--- a/include/hardware/audio.h
+++ b/include/hardware/audio.h
@@ -65,6 +65,7 @@
 #define AUDIO_HARDWARE_MODULE_ID_PRIMARY "primary"
 #define AUDIO_HARDWARE_MODULE_ID_A2DP "a2dp"
 #define AUDIO_HARDWARE_MODULE_ID_USB "usb"
+#define AUDIO_HARDWARE_MODULE_ID_REMOTE_SUBMIX "r_submix"
 
 /**************************************/