diff -r 450cefec7c11 -r cc19f7ca2ed6 src/HOL/Data_Structures/Priority_Queue.thy
--- a/src/HOL/Data_Structures/Priority_Queue.thy	Fri Aug 18 13:55:05 2017 +0200
+++ b/src/HOL/Data_Structures/Priority_Queue.thy	Fri Aug 18 20:47:47 2017 +0200
@@ -3,7 +3,7 @@
 section \<open>Priority Queue Interface\<close>
 
 theory Priority_Queue
-imports "~~/src/HOL/Library/Multiset"
+imports "HOL-Library.Multiset"
 begin
 
 text \<open>Priority queue interface:\<close>