--- a/hotspot/src/share/vm/oops/oop.hpp	Fri Mar 18 15:52:42 2011 -0700
+++ b/hotspot/src/share/vm/oops/oop.hpp	Fri Mar 18 16:00:34 2011 -0700
@@ -129,6 +129,7 @@
 
   // type test operations (inlined in oop.inline.h)
   bool is_instance()           const;
+  bool is_instanceMirror()     const;
   bool is_instanceRef()        const;
   bool is_array()              const;
   bool is_objArray()           const;