--- a/src/HOL/ex/Quicksort.thy Wed Dec 29 13:51:17 2010 +0100
+++ b/src/HOL/ex/Quicksort.thy Wed Dec 29 17:34:41 2010 +0100
@@ -5,7 +5,7 @@
header {* Quicksort with function package *}
theory Quicksort
-imports Main Multiset
+imports Main "~~/src/HOL/Library/Multiset"
begin
context linorder