--- a/src/HOL/Library/List_Prefix.thy Mon Dec 10 11:24:09 2007 +0100
+++ b/src/HOL/Library/List_Prefix.thy Mon Dec 10 11:24:12 2007 +0100
@@ -6,7 +6,7 @@
header {* List prefixes and postfixes *}
theory List_Prefix
-imports Main
+imports List
begin
subsection {* Prefix order on lists *}