--- a/hotspot/src/share/vm/oops/klass.hpp	Tue May 21 19:52:01 2013 -0700
+++ b/hotspot/src/share/vm/oops/klass.hpp	Wed May 22 14:37:49 2013 -0400
@@ -445,7 +445,7 @@
   Klass* array_klass_or_null(int rank);
   Klass* array_klass_or_null();
 
-  virtual oop protection_domain()       { return NULL; }
+  virtual oop protection_domain() const = 0;
 
   oop class_loader() const;