diff --git a/sys/boot/pc98/libpc98/biosmem.c b/sys/boot/pc98/libpc98/biosmem.c
index 4f22086c59d..b450922e3d2 100644
--- a/sys/boot/pc98/libpc98/biosmem.c
+++ b/sys/boot/pc98/libpc98/biosmem.c
@@ -34,7 +34,7 @@ __FBSDID("$FreeBSD$");
 #include "libi386.h"
 #include "btxv86.h"
 
-vm_offset_t	memtop;
+vm_offset_t	memtop, memtop_copyin;
 u_int32_t	bios_basemem, bios_extmem;
 
 void
@@ -46,7 +46,7 @@ bios_getmem(void)
 	*(u_int16_t *)PTOV(0xA1594) * 1024 * 1024;
 
     /* Set memtop to actual top of memory */
-    memtop = 0x100000 + bios_extmem;
+    memtop = memtop_copyin = 0x100000 + bios_extmem;
 
 }