--- a/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	Wed Nov 27 10:21:22 2019 +0100
+++ b/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	Tue Nov 26 10:47:46 2019 +0100
@@ -31,6 +31,7 @@
 #include "memory/allocation.inline.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
+#include "runtime/atomic.hpp"
 #include "runtime/globals.hpp"
 
 jint EpsilonHeap::initialize() {