Index: defaults/amd64/Makefile.config
===================================================================
--- defaults/amd64/Makefile.config	(revision ca2815eb035910c0bb4c6f348ec29513bde33098)
+++ defaults/amd64/Makefile.config	(revision b81410fcf99e55d6fef37a1ff0a6e10f437e8cb6)
@@ -67,2 +67,5 @@
 # OHCI root hub power switch, ganged is enough
 OHCI_POWER_SWITCH = ganged
+
+# GRUB boot loader architecture
+GRUB_ARCH = pc