diff --git a/sys/pc98/cbus/clock.c b/sys/pc98/cbus/clock.c
index f00e764443e..1c7e231dc8a 100644
--- a/sys/pc98/cbus/clock.c
+++ b/sys/pc98/cbus/clock.c
@@ -167,7 +167,7 @@ static	int	i8254_ticked;
 /*
  * XXX new_function and timer_func should not handle clockframes, but
  * timer_func currently needs to hold hardclock to handle the
- * timer0_state == 0 case.  We should use register_intr()/unregister_intr()
+ * timer0_state == 0 case.  We should use inthand_add()/inthand_remove()
  * to switch between clkintr() and a slightly different timerintr().
  */
 static	void	(*new_function) __P((struct clockframe *frame));
diff --git a/sys/pc98/cbus/pcrtc.c b/sys/pc98/cbus/pcrtc.c
index f00e764443e..1c7e231dc8a 100644
--- a/sys/pc98/cbus/pcrtc.c
+++ b/sys/pc98/cbus/pcrtc.c
@@ -167,7 +167,7 @@ static	int	i8254_ticked;
 /*
  * XXX new_function and timer_func should not handle clockframes, but
  * timer_func currently needs to hold hardclock to handle the
- * timer0_state == 0 case.  We should use register_intr()/unregister_intr()
+ * timer0_state == 0 case.  We should use inthand_add()/inthand_remove()
  * to switch between clkintr() and a slightly different timerintr().
  */
 static	void	(*new_function) __P((struct clockframe *frame));
diff --git a/sys/pc98/pc98/clock.c b/sys/pc98/pc98/clock.c
index f00e764443e..1c7e231dc8a 100644
--- a/sys/pc98/pc98/clock.c
+++ b/sys/pc98/pc98/clock.c
@@ -167,7 +167,7 @@ static	int	i8254_ticked;
 /*
  * XXX new_function and timer_func should not handle clockframes, but
  * timer_func currently needs to hold hardclock to handle the
- * timer0_state == 0 case.  We should use register_intr()/unregister_intr()
+ * timer0_state == 0 case.  We should use inthand_add()/inthand_remove()
  * to switch between clkintr() and a slightly different timerintr().
  */
 static	void	(*new_function) __P((struct clockframe *frame));