--- a/src/HOL/Library/Product_ord.thy Tue Dec 18 12:26:24 2007 +0100
+++ b/src/HOL/Library/Product_ord.thy Tue Dec 18 14:37:00 2007 +0100
@@ -6,7 +6,7 @@
header {* Order on product types *}
theory Product_ord
-imports PreList
+imports ATP_Linkup
begin
instantiation "*" :: (ord, ord) ord