diff --git a/constants/dss_equ.inc b/constants/dss_equ.inc
index 2d10533..e3f48d0 100644
--- a/constants/dss_equ.inc
+++ b/constants/dss_equ.inc
@@ -121,7 +121,6 @@ Dss:
 .K_SETUP.SetLayout	EQU	0*256 + .K_SETUP
 .K_SETUP.GetSoundVars	EQU	1*256 + .K_SETUP
 .K_SETUP.SetSoundVars	EQU	2*256 + .K_SETUP
-.K_SETUP.ClearSIObuff	EQU	3*256 + .K_SETUP
 .TestKey        EQU     #37
 ;
 ;       Memory