diff -r c887851da33d -r 97d13893ec3c src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp
--- a/src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp	Wed Nov 27 10:21:22 2019 +0100
+++ b/src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp	Tue Nov 26 10:47:46 2019 +0100
@@ -26,6 +26,7 @@
 #include "gc/shared/owstTaskTerminator.hpp"
 #include "gc/shared/taskqueue.hpp"
 #include "memory/allocation.hpp"
+#include "runtime/atomic.hpp"
 #include "runtime/mutex.hpp"
 #include "runtime/thread.hpp"