diff --git a/sys/dev/ic/i8253reg.h b/sys/dev/ic/i8253reg.h
index 78b231618345..bf251db80e29 100644
--- a/sys/dev/ic/i8253reg.h
+++ b/sys/dev/ic/i8253reg.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: i8253reg.h,v 1.4 1994/10/27 04:18:17 cgd Exp $	*/
+/*	$NetBSD: i8253reg.h,v 1.5 1998/01/19 11:38:00 drochner Exp $	*/
 
 /*-
  * Copyright (c) 1993 The Regents of the University of California.
@@ -79,10 +79,10 @@
 /*
  * Macros for specifying values to be written into a mode register.
  */
-#define	TIMER_CNTR0	(IO_TIMER1 + 0)	/* timer 0 counter port */
-#define	TIMER_CNTR1	(IO_TIMER1 + 1)	/* timer 1 counter port */
-#define	TIMER_CNTR2	(IO_TIMER1 + 2)	/* timer 2 counter port */
-#define	TIMER_MODE	(IO_TIMER1 + 3)	/* timer mode port */
+#define	TIMER_CNTR0	0	/* timer 0 counter port */
+#define	TIMER_CNTR1	1	/* timer 1 counter port */
+#define	TIMER_CNTR2	2	/* timer 2 counter port */
+#define	TIMER_MODE	3	/* timer mode port */
 #define		TIMER_SEL0	0x00	/* select counter 0 */
 #define		TIMER_SEL1	0x40	/* select counter 1 */
 #define		TIMER_SEL2	0x80	/* select counter 2 */