diff --git a/Source/HBIOS/ps2iface.inc b/Source/HBIOS/ps2iface.inc
index 8d21761d..2c9a285b 100644
--- a/Source/HBIOS/ps2iface.inc
+++ b/Source/HBIOS/ps2iface.inc
@@ -70,11 +70,13 @@ KBD_INT:
 ;	CALL	KBDQDBG
 	LD	A,(KBDPORTS)		; READ CONTROLLER STATUS
 	LD	C,A
+	EZ80_IO
 	IN	A,(C)
 	AND	1
 	RET	Z
 	LD	A,(KBDPORTD)		; GET THE RESPONSE
 	LD	C,A
+	EZ80_IO
 	IN	A,(C)
 ;	CALL	KBDQPUSH		; SAVE KEYBOARD SCAN CODE
 ;	RET
@@ -144,6 +146,7 @@ KBDQPOP:
 ;	RETURN A BYTE FROM THE KEYBOARD PORT
 ;
 KBD_IN:
+	EZ80_IO
 	IN	A,(C)			; GET THE DATA VALUE
 	LD	C,(IY+KBD_DAT)		; DATA PORT
 	EZ80_IO