--- old/make/linux/makefiles/buildtree.make	2013-07-04 15:04:16.012529792 +0000
+++ new/make/linux/makefiles/buildtree.make	2013-07-04 15:04:15.852529625 +0000
@@ -193,6 +193,7 @@
 DATA_MODE/sparc = 32
 DATA_MODE/sparcv9 = 64
 DATA_MODE/amd64 = 64
+DATA_MODE/ppc64 = 64
 
 DATA_MODE = $(DATA_MODE/$(BUILDARCH))