--- old/src/hotspot/share/runtime/objectMonitor.hpp	2019-05-04 16:22:51.233550187 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.hpp	2019-05-04 16:22:49.978548316 -0700
@@ -139,6 +139,7 @@
   friend class ObjectSynchronizer;
   friend class ObjectWaiter;
   friend class VMStructs;
+  JVMCI_ONLY(friend class JVMCIVMStructs;)
 
   volatile markOop   _header;       // displaced object header word - mark
   void*     volatile _object;       // backward object pointer - strong root