src/HOL/GCD.thy

--- a/src/HOL/GCD.thy	Sun Aug 01 23:18:13 2021 +0200
+++ b/src/HOL/GCD.thy	Mon Aug 02 10:01:06 2021 +0000
@@ -31,7 +31,7 @@
 section \<open>Greatest common divisor and least common multiple\<close>
 
 theory GCD
-  imports Groups_List 
+  imports Groups_List Code_Numeral
 begin
 
 subsection \<open>Abstract bounded quasi semilattices as common foundation\<close>