--- a/src/HOL/Library/Eval_Witness.thy Mon Dec 10 11:24:09 2007 +0100
+++ b/src/HOL/Library/Eval_Witness.thy Mon Dec 10 11:24:12 2007 +0100
@@ -7,7 +7,7 @@
header {* Evaluation Oracle with ML witnesses *}
theory Eval_Witness
-imports Main
+imports List
begin
text {*