--- a/src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp	Tue Jul 02 13:25:51 2019 +0100
+++ b/src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp	Tue Jul 02 10:21:23 2019 -0400
@@ -36,7 +36,7 @@
 public:
   typedef void (*OopsDo)(OopClosure*);
 private:
-  volatile bool                             _claimed;
+  ShenandoahSharedFlag                      _claimed;
   const OopsDo                              _oops_do;
   const ShenandoahPhaseTimings::GCParPhases _phase;