--- old/src/share/vm/gc/g1/heapRegion.hpp	2016-04-06 17:17:24.526383668 +0200
+++ new/src/share/vm/gc/g1/heapRegion.hpp	2016-04-06 17:17:24.390383667 +0200
@@ -694,7 +694,7 @@
   oops_on_card_seq_iterate_careful(MemRegion mr,
                                    FilterOutOfRegionClosure* cl,
                                    bool filter_young,
-                                   jbyte* card_ptr);
+                                   volatile jbyte* card_ptr);
 
   size_t recorded_rs_length() const        { return _recorded_rs_length; }
   double predicted_elapsed_time_ms() const { return _predicted_elapsed_time_ms; }