diff --git a/sys/boot/pc98/pc98boot/Makefile b/sys/boot/pc98/pc98boot/Makefile
index 0e33735e587..73bfba50fbb 100644
--- a/sys/boot/pc98/pc98boot/Makefile
+++ b/sys/boot/pc98/pc98boot/Makefile
@@ -1,14 +1,22 @@
 # $FreeBSD$
 
 FILES=	${BOOT}
-SRCS=	${BOOT0} ${BOOT05}
 CLEANFILES= ${BOOT} ${BOOT}.part
 
 BOOT=	pc98boot
-BOOT0=	${.CURDIR}/../boot0/boot0
-BOOT05=	${.CURDIR}/../boot0.5/boot0.5
 
-${BOOT}: ${SRCS} ${BOOT}.part
+.if exists(${.OBJDIR}/../boot0)
+BOOT0=	${.OBJDIR}/../boot0/boot0
+.else
+BOOT0=	${.CURDIR}/../boot0/boot0
+.endif
+.if exists(${.OBJDIR}/../boot0.5)
+BOOT05=	${.OBJDIR}/../boot0.5/boot0.5
+.else
+BOOT05=	${.CURDIR}/../boot0.5/boot0.5
+.endif
+
+${BOOT}: ${BOOT0} ${BOOT05} ${BOOT}.part
 	cat ${BOOT0} ${BOOT}.part ${BOOT05} > ${.TARGET}
 
 ${BOOT}.part: