diff -r 89d05db6dd1f -r bd9d27ccb3a3 src/HOL/ex/Word.thy
--- a/src/HOL/ex/Word.thy	Tue Feb 04 16:19:15 2020 +0000
+++ b/src/HOL/ex/Word.thy	Mon Feb 03 20:42:04 2020 +0000
@@ -674,7 +674,7 @@
 
 lift_definition not_word :: "'a word \<Rightarrow> 'a word"
   is not
-  by (simp add: take_bit_not_iff_int)
+  by (simp add: take_bit_not_iff)
 
 lift_definition and_word :: "'a word \<Rightarrow> 'a word \<Rightarrow> 'a word"
   is \<open>and\<close>