diff -r 6061ae1f90f2 -r 9bc16273c2d4 src/HOL/UNITY/ListOrder.thy
--- a/src/HOL/UNITY/ListOrder.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/UNITY/ListOrder.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -15,7 +15,7 @@
 
 header {*The Prefix Ordering on Lists*}
 
-theory ListOrder = Main:
+theory ListOrder imports Main begin
 
 consts
   genPrefix :: "('a * 'a)set => ('a list * 'a list)set"