--- a/src/HOL/Induct/ABexp.thy Thu Sep 11 19:26:59 2014 +0200
+++ b/src/HOL/Induct/ABexp.thy Thu Sep 11 19:32:36 2014 +0200
@@ -8,7 +8,7 @@
imports Main
begin
-datatype_new 'a aexp =
+datatype 'a aexp =
IF "'a bexp" "'a aexp" "'a aexp"
| Sum "'a aexp" "'a aexp"
| Diff "'a aexp" "'a aexp"