1.1 --- a/src/HOL/Library/ROOT.ML	Sun Jul 31 11:13:38 2011 -0700
     1.2 +++ b/src/HOL/Library/ROOT.ML	Mon Aug 01 09:31:10 2011 -0700
     1.3 @@ -2,4 +2,5 @@
     1.4  (* Classical Higher-order Logic -- batteries included *)
     1.5  
     1.6  use_thys ["Library", "List_Prefix", "List_lexord", "Sublist_Order",
     1.7 +  "Product_Lattice",
     1.8    "Code_Char_chr", "Code_Char_ord", "Code_Integer", "Efficient_Nat", "Executable_Set"(*, "Code_Prolog"*)];