--- a/hotspot/src/share/vm/gc/shared/cardTableModRefBS.hpp	Wed Sep 02 16:16:58 2015 +0200
+++ b/hotspot/src/share/vm/gc/shared/cardTableModRefBS.hpp	Wed Sep 02 11:41:42 2015 -0400
@@ -183,7 +183,7 @@
   // these functions here for performance.
 
   void write_ref_field_work(oop obj, size_t offset, oop newVal);
-  virtual void write_ref_field_work(void* field, oop newVal, bool release = false);
+  virtual void write_ref_field_work(void* field, oop newVal, bool release);
 public:
 
   bool has_write_ref_array_opt() { return true; }