diff --git a/linux-2.6-xen-sparse/arch/ia64/xen/drivers/xenia64_init.c b/linux-2.6-xen-sparse/arch/ia64/xen/drivers/xenia64_init.c
index dc22f076f7..58403804fb 100644
--- a/linux-2.6-xen-sparse/arch/ia64/xen/drivers/xenia64_init.c
+++ b/linux-2.6-xen-sparse/arch/ia64/xen/drivers/xenia64_init.c
@@ -8,7 +8,7 @@
 #include <xen/interface/arch-ia64.h>
 #include <linux/vmalloc.h>
 
-shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)0xf100000000000000;
+shared_info_t *HYPERVISOR_shared_info = (shared_info_t *)XSI_BASE;
 EXPORT_SYMBOL(HYPERVISOR_shared_info);
 
 static int initialized;