--- xen-4.0.1/config/StdGNU.mk
+++ xen-4.0.1.mod/config/StdGNU.mk
@@ -28,7 +28,7 @@
 INCLUDEDIR = $(PREFIX)/include
 LIBLEAFDIR = lib
 LIBLEAFDIR_x86_32 = lib
-LIBLEAFDIR_x86_64 ?= lib64
+LIBLEAFDIR_x86_64 ?= lib
 LIBDIR = $(PREFIX)/$(LIBLEAFDIR)
 LIBDIR_x86_32 = $(PREFIX)/$(LIBLEAFDIR_x86_32)
 LIBDIR_x86_64 = $(PREFIX)/$(LIBLEAFDIR_x86_64)