--- old/src/hotspot/share/oops/instanceMirrorKlass.hpp	2018-08-14 19:23:04.173709714 -0700
+++ new/src/hotspot/share/oops/instanceMirrorKlass.hpp	2018-08-14 19:23:03.853697483 -0700
@@ -99,6 +99,8 @@
   void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
 #endif
 
+  static void serialize(class SerializeClosure* f) NOT_CDS_RETURN;
+
   // Oop fields (and metadata) iterators
   //
   // The InstanceMirrorKlass iterators also visit the hidden Klass pointer.