diff --git a/Source/HBIOS/xio.asm b/Source/HBIOS/xio.asm
index 13fda05d..31a7d986 100644
--- a/Source/HBIOS/xio.asm
+++ b/Source/HBIOS/xio.asm
@@ -24,7 +24,7 @@ SIO_SCR		.EQU	UARTIOB + 7	; SCRATCH REGISTER
 SIO_DLL		.EQU	UARTIOB + 0	; DLAB=1: DIVISOR LATCH (LS)
 SIO_DLM		.EQU	UARTIOB + 1	; DLAB=1: DIVISOR LATCH (MS)
 ;
-XIO_DIV		.EQU	(UARTOSC / (16 * CONBAUD))
+;XIO_DIV	.EQU	(UARTOSC / (16 * CONBAUD))
 ;
 #ENDIF