--- old/make/linux/makefiles/buildtree.make	2014-11-17 10:48:44.606547823 -0500
+++ new/make/linux/makefiles/buildtree.make	2014-11-17 10:48:44.396566926 -0500
@@ -194,6 +194,7 @@
 DATA_MODE/sparcv9 = 64
 DATA_MODE/amd64 = 64
 DATA_MODE/ppc64 = 64
+DATA_MODE/aarch64 = 64
 
 DATA_MODE = $(DATA_MODE/$(BUILDARCH))