--- a/src/HOL/Library/Option_ord.thy Sat Nov 04 18:57:49 2017 +0100
+++ b/src/HOL/Library/Option_ord.thy Sat Nov 04 19:17:19 2017 +0100
@@ -5,7 +5,7 @@
section \<open>Canonical order on option type\<close>
theory Option_ord
-imports HOL.Option Main
+imports Main
begin
notation