diff -r c61507a98bff -r c8a6ce181805 src/HOL/Library/Nested_Environment.thy
--- a/src/HOL/Library/Nested_Environment.thy	Fri Jul 04 16:33:08 2008 +0200
+++ b/src/HOL/Library/Nested_Environment.thy	Mon Jul 07 08:47:17 2008 +0200
@@ -6,7 +6,7 @@
 header {* Nested environments *}
 
 theory Nested_Environment
-imports Plain List
+imports Plain "~~/src/HOL/List"
 begin
 
 text {*