diff -r 1bece7f35762 -r 33fe2d701ddd src/HOL/Induct/Sexp.thy
--- a/src/HOL/Induct/Sexp.thy	Thu Oct 12 18:09:06 2000 +0200
+++ b/src/HOL/Induct/Sexp.thy	Thu Oct 12 18:38:23 2000 +0200
@@ -7,7 +7,7 @@
 structures by hand.
 *)
 
-Sexp = Univ + Inductive +
+Sexp = Datatype_Universe + Inductive +
 consts
   sexp      :: 'a item set