src/HOL/Library/Efficient_Nat.thy

--- a/src/HOL/Library/Efficient_Nat.thy	Tue May 19 13:57:31 2009 +0200
+++ b/src/HOL/Library/Efficient_Nat.thy	Tue May 19 13:57:32 2009 +0200
@@ -5,7 +5,7 @@
 header {* Implementation of natural numbers by target-language integers *}
 
 theory Efficient_Nat
-imports Code_Index Code_Integer Main
+imports Code_Integer Main
 begin
 
 text {*