diff -r be80c93ac0a2 -r a9be7f26b4e6 src/HOL/Predicate_Compile_Examples/IMP_4.thy
--- a/src/HOL/Predicate_Compile_Examples/IMP_4.thy	Fri Dec 03 08:40:47 2010 +0100
+++ b/src/HOL/Predicate_Compile_Examples/IMP_4.thy	Fri Dec 03 08:40:47 2010 +0100
@@ -31,7 +31,7 @@
 lemma
   "exec c s s' ==> exec (Seq c c) s s'"
   nitpick (* nitpick fails here! *)
-  quickcheck[generator = predicate_compile_wo_ff, size=2, iterations=10, expect=counterexample]
+  quickcheck[tester = predicate_compile_wo_ff, size=2, iterations=10, expect=counterexample]
 oops
 
 end
\ No newline at end of file