--- a/src/hotspot/share/gc/parallel/psPromotionManager.hpp	Fri Aug 16 09:18:32 2019 +0200
+++ b/src/hotspot/share/gc/parallel/psPromotionManager.hpp	Fri Aug 16 09:18:35 2019 +0200
@@ -53,6 +53,8 @@
   friend class PSScavenge;
   friend class ScavengeRootsTask;
   friend class PSRefProcTaskExecutor;
+  friend class PSRefProcTask;
+
  private:
   static PaddedEnd<PSPromotionManager>* _manager_array;
   static OopStarTaskQueueSet*           _stack_array_depth;