Index: defaults/amd64/Makefile.config
===================================================================
--- defaults/amd64/Makefile.config	(revision ca2815eb035910c0bb4c6f348ec29513bde33098)
+++ defaults/amd64/Makefile.config	(revision 3f0ad85a07547e267a9dc38cccfa9e97cd532764)
@@ -67,2 +67,5 @@
 # OHCI root hub power switch, ganged is enough
 OHCI_POWER_SWITCH = ganged
+
+# GRUB boot loader architecture
+GRUB_ARCH = pc