diff --git a/sys/boot/i386/zfsboot/Makefile b/sys/boot/i386/zfsboot/Makefile
index bb16ea3..7dedb49 100644
--- a/sys/boot/i386/zfsboot/Makefile
+++ b/sys/boot/i386/zfsboot/Makefile
@@ -83,6 +83,8 @@ zfsboot.bin: zfsboot.out
 zfsboot.out: ${BTXCRT} zfsboot.o sio.o drv.o cons.o util.o
 	${LD} ${LDFLAGS} -Ttext ${ORG2} -o ${.TARGET} ${.ALLSRC} ${LIBSTAND}
 
+drv.o: drv.c xreadorg.h
+
 zfsboot.o: zfsboot.s
 
 SRCS=	zfsboot.c xreadorg.h