diff --git a/sys/i386/isa/atpic_vector.s b/sys/i386/isa/atpic_vector.s
index 7cf4b7ace88..008335d6e01 100644
--- a/sys/i386/isa/atpic_vector.s
+++ b/sys/i386/isa/atpic_vector.s
@@ -37,12 +37,6 @@
  */
 
 #include <machine/asmacros.h>
-#include <i386/isa/icu.h>
-#ifdef PC98
-#include <pc98/pc98/pc98.h>
-#else
-#include <i386/isa/isa.h>
-#endif
 
 #include "assym.s"
 
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index e7c3d26683b..36c0826039f 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -75,7 +75,6 @@ __FBSDID("$FreeBSD$");
 #endif
 #include <machine/specialreg.h>
 
-#include <i386/isa/icu.h>
 #include <i386/isa/isa.h>
 #include <isa/rtc.h>
 #ifdef DEV_ISA
diff --git a/sys/i386/isa/npx.c b/sys/i386/isa/npx.c
index 484d6711d03..ad5e4d00590 100644
--- a/sys/i386/isa/npx.c
+++ b/sys/i386/isa/npx.c
@@ -70,7 +70,6 @@ __FBSDID("$FreeBSD$");
 #include <machine/segments.h>
 #include <machine/ucontext.h>
 
-#include <i386/isa/icu.h>
 #ifdef PC98
 #include <pc98/pc98/pc98.h>
 #else
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index e7c3d26683b..36c0826039f 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -75,7 +75,6 @@ __FBSDID("$FreeBSD$");
 #endif
 #include <machine/specialreg.h>
 
-#include <i386/isa/icu.h>
 #include <i386/isa/isa.h>
 #include <isa/rtc.h>
 #ifdef DEV_ISA