--- debootstrap.orig	2011-08-25 20:19:23.294346076 +0200
+++ debootstrap	2011-08-25 20:22:42.850735086 +0200
@@ -419,6 +419,10 @@
 	esac
 fi
 
+if [ "$HOST_OS" = "freebsd" -a -z "$HOST_ARCH" ]; then
+	HOST_ARCH=kfreebsd-`/sbin/sysctl -n hw.machine_arch`
+fi
+
 if [ -z "$ARCH" ]; then
 	ARCH=$HOST_ARCH
 fi