--- a/src/HOL/Plain.thy	Sat Mar 24 16:27:04 2012 +0100
+++ b/src/HOL/Plain.thy	Sun Mar 25 20:15:39 2012 +0200
@@ -1,7 +1,7 @@
 header {* Plain HOL *}
 
 theory Plain
-imports Datatype FunDef Extraction Metis
+imports Datatype FunDef Extraction Metis Num
 begin
 
 text {*