diff -r 9fb0f81b4416 -r 2cab50c41bd9 config/arch/x86_64.in
--- a/config/arch/x86_64.in	Sun Oct 05 15:32:00 2008 +0000
+++ b/config/arch/x86_64.in	Sun Jan 31 13:04:34 2010 +0100
@@ -1,6 +1,7 @@
 # x86_64 specific options
 
 config ARCH_x86_64
+    select ARCH_64
     select ARCH_SUPPORT_ARCH
     select ARCH_SUPPORT_CPU
     select ARCH_SUPPORT_TUNE