diff -r c887851da33d -r 97d13893ec3c src/hotspot/share/gc/parallel/psParallelCompact.hpp
--- a/src/hotspot/share/gc/parallel/psParallelCompact.hpp	Wed Nov 27 10:21:22 2019 +0100
+++ b/src/hotspot/share/gc/parallel/psParallelCompact.hpp	Tue Nov 26 10:47:46 2019 +0100
@@ -32,6 +32,8 @@
 #include "gc/shared/collectedHeap.hpp"
 #include "gc/shared/collectorCounters.hpp"
 #include "oops/oop.hpp"
+#include "runtime/atomic.hpp"
+#include "runtime/orderAccess.hpp"
 
 class ParallelScavengeHeap;
 class PSAdaptiveSizePolicy;