--- a/src/HOL/Library/Library.thy	Fri Jun 14 08:34:27 2019 +0000
+++ b/src/HOL/Library/Library.thy	Fri Jun 14 08:34:27 2019 +0000
@@ -4,7 +4,6 @@
   AList
   Adhoc_Overloading
   BigO
-  Bit
   BNF_Axiomatization
   BNF_Corec
   Boolean_Algebra
@@ -94,6 +93,7 @@
   Type_Length
   Uprod
   While_Combinator
+  Z2
 begin
 end
 (*>*)