diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index 36aac8d3bfc0..0295f773f372 100644
--- a/sys/i386/i386/pmap.c
+++ b/sys/i386/i386/pmap.c
@@ -106,7 +106,9 @@ __FBSDID("$FreeBSD$");
 #include "opt_cpu.h"
 #include "opt_pmap.h"
 #include "opt_msgbuf.h"
+#ifndef PC98 
 #include "opt_xbox.h"
+#endif
 
 #include <sys/param.h>
 #include <sys/systm.h>
diff --git a/sys/i386/i386/vm_machdep.c b/sys/i386/i386/vm_machdep.c
index 217ae8b85b75..d176b82d08bf 100644
--- a/sys/i386/i386/vm_machdep.c
+++ b/sys/i386/i386/vm_machdep.c
@@ -47,7 +47,9 @@ __FBSDID("$FreeBSD$");
 #include "opt_npx.h"
 #include "opt_reset.h"
 #include "opt_cpu.h"
+#ifndef PC98 
 #include "opt_xbox.h"
+#endif
 
 #include <sys/param.h>
 #include <sys/systm.h>
diff --git a/sys/i386/pci/pci_cfgreg.c b/sys/i386/pci/pci_cfgreg.c
index 869649de34a9..4ad3f44f67c0 100644
--- a/sys/i386/pci/pci_cfgreg.c
+++ b/sys/i386/pci/pci_cfgreg.c
@@ -30,7 +30,9 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#ifndef PC98
 #include "opt_xbox.h"
+#endif
 
 #include <sys/param.h>
 #include <sys/systm.h>