diff -r eff55c0a6d34 -r 4a2063a8c2d2 src/HOL/ex/ExecutableContent.thy
--- a/src/HOL/ex/ExecutableContent.thy	Wed Apr 02 15:58:36 2008 +0200
+++ b/src/HOL/ex/ExecutableContent.thy	Wed Apr 02 15:58:37 2008 +0200
@@ -21,6 +21,7 @@
   Nat_Infinity
   NatPair
   Nested_Environment
+  Option_ord
   Permutation
   Primes
   Product_ord