diff --git a/Source/HBIOS/hbios.inc b/Source/HBIOS/hbios.inc
index f8e4acc6..6e25d5f4 100644
--- a/Source/HBIOS/hbios.inc
+++ b/Source/HBIOS/hbios.inc
@@ -195,12 +195,6 @@ VDADEV_CVDU	.EQU	$10		; ECB COLOR VDU - MOS 8563
 VDADEV_NEC	.EQU	$20		; ECB UPD7220 - NEC UPD7220
 VDADEV_TMS	.EQU	$30		; N8 ONBOARD VDA SUBSYSTEM - TMS 9918
 VDADEV_VGA	.EQU	$40		; ECB VGA3 - HITACHI HD6445
-;
-; SOUND DEVICE IDS
-;
-SNDDEV_SN	.EQU	$00		; SN76489
-SNDDEV_AY	.EQU	$10		; AY-3-8910
-SNDDEV_BM	.EQU	$20		; BITMODE
 ;;
 ;; EMULATION TYPES - moved to std.asm
 ;;