--- config.sub.old	2009-02-27 08:14:06.000000000 +0000
+++ config.sub	2009-02-27 08:14:55.000000000 +0000
@@ -632,6 +632,9 @@
 	pentiumii-* | pentium2-*)
 		basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
 		;;
+	x86_64-*)
+		basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
 	pn)
 		basic_machine=pn-gould
 		;;