diff -r 57752a91eec4 -r 117ba6cbe414 src/HOL/Library/Bit.thy
--- a/src/HOL/Library/Bit.thy	Thu Sep 11 18:54:36 2014 +0200
+++ b/src/HOL/Library/Bit.thy	Thu Sep 11 18:54:36 2014 +0200
@@ -27,7 +27,7 @@
 
 end
 
-rep_datatype "0::bit" "1::bit"
+old_rep_datatype "0::bit" "1::bit"
 proof -
   fix P and x :: bit
   assume "P (0::bit)" and "P (1::bit)"