--- old/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	2019-11-26 12:09:26.717284843 +0100
+++ new/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp	2019-11-26 12:09:26.461280427 +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"