--- a/hotspot/src/share/vm/gc/g1/sparsePRT.hpp	Tue Sep 20 20:22:19 2016 +0200
+++ b/hotspot/src/share/vm/gc/g1/sparsePRT.hpp	Tue Sep 20 15:42:17 2016 -0400
@@ -250,7 +250,7 @@
 
   bool should_be_on_expanded_list();
 
-  static SparsePRT* _head_expanded_list;
+  static SparsePRT* volatile _head_expanded_list;
 
 public:
   SparsePRT(HeapRegion* hr);