--- old/src/share/vm/gc/g1/concurrentG1RefineThread.hpp	2016-02-11 13:39:04.193303870 -0500
+++ new/src/share/vm/gc/g1/concurrentG1RefineThread.hpp	2016-02-11 13:39:03.481263495 -0500
@@ -53,11 +53,11 @@
   // The closure applied to completed log buffers.
   CardTableEntryClosure* _refine_closure;
 
-  int _thread_threshold_step;
+  size_t _thread_threshold_step;
   // This thread activation threshold
-  int _threshold;
+  size_t _threshold;
   // This thread deactivation threshold
-  int _deactivation_threshold;
+  size_t _deactivation_threshold;
 
   void wait_for_completed_buffers();