diff --git a/sys/arch/alpha/alpha/machdep.c b/sys/arch/alpha/alpha/machdep.c
index 9dbca5cca8ba..e42d1ada07dc 100644
--- a/sys/arch/alpha/alpha/machdep.c
+++ b/sys/arch/alpha/alpha/machdep.c
@@ -1,4 +1,4 @@
-/* $NetBSD: machdep.c,v 1.99 1998/01/31 10:32:49 ross Exp $ */
+/* $NetBSD: machdep.c,v 1.100 1998/02/10 03:52:05 thorpej Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.99 1998/01/31 10:32:49 ross Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.100 1998/02/10 03:52:05 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -182,9 +182,9 @@ struct bootinfo bootinfo;
 
 struct platform platform;
 
-u_int32_t vm_mbuf_size = (NMBCLUSTERS*MCLBYTES);
-u_int32_t vm_kmem_size = (NKMEMCLUSTERS*CLBYTES);
-u_int32_t vm_phys_size = (USRIOSIZE*CLBYTES);
+u_int32_t vm_mbuf_size = _VM_MBUF_SIZE;
+u_int32_t vm_kmem_size = _VM_KMEM_SIZE;
+u_int32_t vm_phys_size = _VM_PHYS_SIZE;
 
 #ifdef DDB
 /* start and end of kernel symbol table */
diff --git a/sys/arch/alpha/include/vmparam.h b/sys/arch/alpha/include/vmparam.h
index c9d89c53f9af..28c66a05b295 100644
--- a/sys/arch/alpha/include/vmparam.h
+++ b/sys/arch/alpha/include/vmparam.h
@@ -1,4 +1,4 @@
-/* $NetBSD: vmparam.h,v 1.6 1997/09/23 23:23:23 mjacob Exp $ */
+/* $NetBSD: vmparam.h,v 1.7 1998/02/10 03:52:06 thorpej Exp $ */
 #ifndef	_ALPHA_VMPARAM_H
 #define	_ALPHA_VMPARAM_H
 /*
@@ -136,16 +136,20 @@
 #define VM_MAX_KERNEL_ADDRESS	((vm_offset_t)ALPHA_K1SEG_END)
 
 /* virtual sizes (bytes) for various kernel submaps */
+#define _VM_MBUF_SIZE		(NMBCLUSTERS*MCLBYTES)
+#define _VM_KMEM_SIZE		(NKMEMCLUSTERS*CLBYTES)
+#define _VM_PHYS_SIZE		(USRIOSIZE*CLBYTES)
+
 #ifndef	_KERNEL
-#define VM_MBUF_SIZE		(NMBCLUSTERS*MCLBYTES)
-#define VM_KMEM_SIZE		(NKMEMCLUSTERS*CLBYTES)
-#define VM_PHYS_SIZE		(USRIOSIZE*CLBYTES)
+#define VM_MBUF_SIZE		_VM_MBUF_SIZE
+#define VM_KMEM_SIZE		_VM_KMEM_SIZE
+#define VM_PHYS_SIZE		_VM_PHYS_SIZE
 #else
 extern u_int32_t vm_mbuf_size, vm_kmem_size, vm_phys_size;
 #define VM_MBUF_SIZE		vm_mbuf_size
 #define VM_KMEM_SIZE		vm_kmem_size
 #define VM_PHYS_SIZE		vm_phys_size
-#endif
+#endif /* _KERNEL */
 
 /* some Alpha-specific constants */
 #define	VPTBASE		((vm_offset_t)0xfffffffc00000000) /* Virt. pg table */