diff --git a/sys/arch/evbarm/conf/mk.marvell b/sys/arch/evbarm/conf/mk.marvell
index 988b8e4b26e0..91d207405699 100644
--- a/sys/arch/evbarm/conf/mk.marvell
+++ b/sys/arch/evbarm/conf/mk.marvell
@@ -1,12 +1,12 @@
-#	$NetBSD: mk.marvell,v 1.3 2011/06/30 18:20:24 matt Exp $
+#	$NetBSD: mk.marvell,v 1.4 2012/08/10 02:46:51 matt Exp $
 
 SYSTEM_FIRST_OBJ=	marvell_start.o
 SYSTEM_FIRST_SFILE=	${THISARM}/marvell/marvell_start.S
 
 _OSRELEASE!=		${HOST_SH} $S/conf/osrelease.sh
 
-KERNEL_BASE_PHYS=0x00008000
-KERNEL_BASE_VIRT=0xc0008000
+KERNEL_BASE_PHYS?=0x00008000
+KERNEL_BASE_VIRT?=0xc0008000
 
 MKUBOOTIMAGEARGS=	-A arm -T kernel
 MKUBOOTIMAGEARGS+=	-a $(KERNEL_BASE_PHYS)