--- a/src/hotspot/share/services/threadIdTable.cpp	Wed Nov 27 10:21:22 2019 +0100
+++ b/src/hotspot/share/services/threadIdTable.cpp	Tue Nov 26 10:47:46 2019 +0100
@@ -24,6 +24,7 @@
 */
 
 #include "precompiled.hpp"
+#include "runtime/atomic.hpp"
 #include "runtime/interfaceSupport.inline.hpp"
 #include "runtime/thread.hpp"
 #include "runtime/threadSMR.hpp"
@@ -32,7 +33,6 @@
 #include "utilities/concurrentHashTable.inline.hpp"
 #include "utilities/concurrentHashTableTasks.inline.hpp"
 
-
 typedef ConcurrentHashTable<ThreadIdTableConfig, mtInternal> ThreadIdTableHash;
 
 // 2^24 is max size