diff --git a/lib/uuid.h b/lib/uuid.h
index 5cdfedb..cd3b365 100644
--- a/lib/uuid.h
+++ b/lib/uuid.h
@@ -179,6 +179,11 @@ extern "C" {
 #define VOL_CP_CHRC_UUID				0x2B7E
 #define VOL_FLAG_CHRC_UUID				0x2B7F
 
+#define VOCS_STATE_CHAR_UUID			0x2B80
+#define VOCS_AUDIO_LOC_CHRC_UUID		0x2B81
+#define VOCS_CP_CHRC_UUID			0x2B82
+#define VOCS_AUDIO_OP_DESC_CHAR_UUID		0x2B83
+
 #define GMCS_UUID                               0x1849
 #define MEDIA_PLAYER_NAME_CHRC_UUID             0x2b93
 #define MEDIA_TRACK_CHNGD_CHRC_UUID             0x2b96