--- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	Wed Nov 27 10:21:22 2019 +0100
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	Tue Nov 26 10:47:46 2019 +0100
@@ -34,6 +34,7 @@
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "oops/oop.inline.hpp"
+#include "runtime/atomic.hpp"
 #include "runtime/java.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/os.hpp"