diff --git a/sys/arch/powerpc/include/oea/vmparam.h b/sys/arch/powerpc/include/oea/vmparam.h
index b90d1b9d7c01..92a0cdffaae6 100644
--- a/sys/arch/powerpc/include/oea/vmparam.h
+++ b/sys/arch/powerpc/include/oea/vmparam.h
@@ -156,6 +156,8 @@
 #endif
 #define	KERNEL2_SEGMENT		VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS)
 #define	KERNEL_VSIDBITS		0xfffff
+#define	PHYSMAP_VSIDBITS	0xffffe
+#define	PHYSMAPN_SEGMENT(s)	VSID_MAKE(s, PHYSMAP_VSIDBITS)
 #define	KERNEL_SEGMENT		VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS)
 #define	KERNELN_SEGMENT(s)	VSID_MAKE(s, KERNEL_VSIDBITS)
 /* XXXSL: need something here that will never be mapped */