diff --git a/sys/arch/alpha/common/sgmap_typedep.c b/sys/arch/alpha/common/sgmap_typedep.c
index 63477b81d2cb..1c0d8d012c9b 100644
--- a/sys/arch/alpha/common/sgmap_typedep.c
+++ b/sys/arch/alpha/common/sgmap_typedep.c
@@ -1,4 +1,4 @@
-/* $NetBSD: sgmap_typedep.c,v 1.9 1998/03/23 07:51:26 mjacob Exp $ */
+/* $NetBSD: sgmap_typedep.c,v 1.10 1998/06/04 01:22:52 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@@ -37,7 +37,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-__KERNEL_RCSID(0, "$NetBSD: sgmap_typedep.c,v 1.9 1998/03/23 07:51:26 mjacob Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sgmap_typedep.c,v 1.10 1998/06/04 01:22:52 thorpej Exp $");
 
 #ifdef SGMAP_LOG
 
@@ -59,6 +59,15 @@ int			__C(SGMAP_TYPE,_debug) = 0;
 
 SGMAP_PTE_TYPE		__C(SGMAP_TYPE,_prefetch_spill_page_pte);
 
+void
+__C(SGMAP_TYPE,_init_spill_page_pte)()
+{
+
+	__C(SGMAP_TYPE,_prefetch_spill_page_pte) =
+	    (alpha_sgmap_prefetch_spill_page_pa >>
+	     SGPTE_PGADDR_SHIFT) | SGPTE_VALID;
+}
+
 int
 __C(SGMAP_TYPE,_load)(t, map, buf, buflen, p, flags, sgmap)
 	bus_dma_tag_t t;
@@ -83,9 +92,7 @@ __C(SGMAP_TYPE,_load)(t, map, buf, buflen, p, flags, sgmap)
 	 * Initialize the spill page PTE if that hasn't already been done.
 	 */
 	if (__C(SGMAP_TYPE,_prefetch_spill_page_pte) == 0)
-		__C(SGMAP_TYPE,_prefetch_spill_page_pte) =
-		    (alpha_sgmap_prefetch_spill_page_pa >>
-		     SGPTE_PGADDR_SHIFT) | SGPTE_VALID;
+		__C(SGMAP_TYPE,_init_spill_page_pte)();
 
 	/*
 	 * Make sure that on error condition we return "no valid mappings".
diff --git a/sys/arch/alpha/common/sgmap_typedep.h b/sys/arch/alpha/common/sgmap_typedep.h
index a7e393719a8d..32c05a08c9a7 100644
--- a/sys/arch/alpha/common/sgmap_typedep.h
+++ b/sys/arch/alpha/common/sgmap_typedep.h
@@ -1,4 +1,4 @@
-/* $NetBSD: sgmap_typedep.h,v 1.3 1998/01/17 21:53:53 thorpej Exp $ */
+/* $NetBSD: sgmap_typedep.h,v 1.4 1998/06/04 01:22:52 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
@@ -43,6 +43,9 @@
 #define	__C(A,B)	__CONCAT(A,B)
 #define	__S(S)		__STRING(S)
 
+extern	SGMAP_PTE_TYPE	__C(SGMAP_TYPE,_prefetch_spill_page_pte);
+
+void	__C(SGMAP_TYPE,_init_spill_page_pte) __P((void));
 int	__C(SGMAP_TYPE,_load) __P((bus_dma_tag_t, bus_dmamap_t,
 	    void *, bus_size_t, struct proc *, int, struct alpha_sgmap *));
 int	__C(SGMAP_TYPE,_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t,