diff --git a/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre b/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre
index 52d66156a9..d79b868448 100755
--- a/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre
+++ b/linux-2.6-xen-sparse/arch/ia64/xen-mkbuildtree-pre
@@ -45,7 +45,7 @@ cp arch/ia64/xen/drivers/evtchn_ia64.c drivers/xen/core
 #tree that Xen sets up for guests has a NULL FADT.  This is a bug
 #that needs to be fixed, at which point this can go away.  In the
 #meantime, this file needs to be updated if the real motherboard.c is
-cp arch/ia64/xen/drivers/evtchn_ia64.c drivers/acpi/motherboard.c
+cp arch/ia64/xen/drivers/motherboard.c drivers/acpi/motherboard.c
 
 #still a few x86-ism's in various drivers/xen files, patch them
 cd drivers/xen