diff --git a/sys/pc98/cbus/clock.c b/sys/pc98/cbus/clock.c
index 03be3735db9..94c57712bb5 100644
--- a/sys/pc98/cbus/clock.c
+++ b/sys/pc98/cbus/clock.c
@@ -70,8 +70,6 @@
 #include <sys/power.h>
 
 #include <machine/clock.h>
-#ifdef CLK_CALIBRATION_LOOP
-#endif
 #include <machine/cputypes.h>
 #include <machine/frame.h>
 #include <machine/limits.h>
diff --git a/sys/pc98/cbus/pcrtc.c b/sys/pc98/cbus/pcrtc.c
index 03be3735db9..94c57712bb5 100644
--- a/sys/pc98/cbus/pcrtc.c
+++ b/sys/pc98/cbus/pcrtc.c
@@ -70,8 +70,6 @@
 #include <sys/power.h>
 
 #include <machine/clock.h>
-#ifdef CLK_CALIBRATION_LOOP
-#endif
 #include <machine/cputypes.h>
 #include <machine/frame.h>
 #include <machine/limits.h>
diff --git a/sys/pc98/pc98/clock.c b/sys/pc98/pc98/clock.c
index 03be3735db9..94c57712bb5 100644
--- a/sys/pc98/pc98/clock.c
+++ b/sys/pc98/pc98/clock.c
@@ -70,8 +70,6 @@
 #include <sys/power.h>
 
 #include <machine/clock.h>
-#ifdef CLK_CALIBRATION_LOOP
-#endif
 #include <machine/cputypes.h>
 #include <machine/frame.h>
 #include <machine/limits.h>