--- a/src/HOL/ex/Radix_Sort.thy	Mon May 28 23:15:30 2018 +0100
+++ b/src/HOL/ex/Radix_Sort.thy	Tue May 29 14:05:59 2018 +0200
@@ -2,7 +2,7 @@
 
 theory Radix_Sort
 imports
-  "HOL-Library.List_lexord" 
+  "HOL-Library.List_Lexorder" 
   "HOL-Library.Sublist" 
   "HOL-Library.Multiset" 
 begin