diff -r 289ad8062cb5 -r fb604f0e5640 src/HOL/Inductive.thy
--- a/src/HOL/Inductive.thy	Sat Mar 04 13:23:07 2000 +0100
+++ b/src/HOL/Inductive.thy	Sat Mar 04 13:25:09 2000 +0100
@@ -2,7 +2,7 @@
     ID:         $Id$
 *)
 
-theory Inductive = Gfp + Prod + Sum
+theory Inductive = Gfp + Prod + Sum + NatDef
 files
   "Tools/induct_method.ML"
   "Tools/inductive_package.ML"