diff --git a/kernel/Makefile b/kernel/Makefile
index 8cc59213d..b85519743 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -3,7 +3,9 @@
 
 PROG=	kernel
 
-SRCS=	clock.c cpulocals.c interrupt.c main.c proc.c start.c system.c \
+.include "arch/${ARCH}/Makefile.inc"
+
+SRCS+=	clock.c cpulocals.c interrupt.c main.c proc.c start.c system.c \
 	table.c utility.c 
 
 DPADD+=	${LIBTIMERS} ${LIBSYS} ${LIBEXEC}
@@ -29,7 +31,6 @@ BINDIR=	/usr/sbin
 MAN=
 
 .include "system/Makefile.inc"
-.include "arch/${ARCH}/Makefile.inc"
 
 .ifdef CONFIG_SMP
 SRCS+= smp.c
diff --git a/kernel/arch/i386/Makefile.inc b/kernel/arch/i386/Makefile.inc
index a53824aab..53bbfb13f 100644
--- a/kernel/arch/i386/Makefile.inc
+++ b/kernel/arch/i386/Makefile.inc
@@ -4,9 +4,9 @@
 
 HERE=${.CURDIR}/arch/${ARCH}
 .PATH:	${HERE}
-SRCS+=	arch_clock.c arch_do_vmctl.c arch_system.c \
+SRCS+=	mpx.S arch_clock.c arch_do_vmctl.c arch_system.c \
 	do_iopenable.c do_readbios.c do_sdevio.c exception.c i8259.c io_inb.S \
-	io_inl.S io_intr.S io_inw.S io_outb.S io_outl.S io_outw.S klib.S klib16.S memory.c mpx.S multiboot.S \
+	io_inl.S io_intr.S io_inw.S io_outb.S io_outl.S io_outw.S klib.S klib16.S memory.c multiboot.S \
 	oxpcie.c pre_init.c protect.c
 
 .if ${USE_ACPI} != "no"