diff -r dc6be28d7f4e -r c69542757a4d src/HOL/Library/Zorn.thy
--- a/src/HOL/Library/Zorn.thy	Mon Aug 16 14:21:54 2004 +0200
+++ b/src/HOL/Library/Zorn.thy	Mon Aug 16 14:22:27 2004 +0200
@@ -6,7 +6,9 @@
 
 header {* Zorn's Lemma *}
 
-theory Zorn = Main:
+theory Zorn
+import Main
+begin
 
 text{*
   The lemma and section numbers refer to an unpublished article