--- old/src/share/vm/gc/g1/sparsePRT.hpp	2016-04-06 17:17:27.002383698 +0200
+++ new/src/share/vm/gc/g1/sparsePRT.hpp	2016-04-06 17:17:26.902383697 +0200
@@ -229,7 +229,7 @@
 
   bool should_be_on_expanded_list();
 
-  static SparsePRT* _head_expanded_list;
+  static SparsePRT* volatile _head_expanded_list;
 
 public:
   SparsePRT(HeapRegion* hr);