--- a/src/hotspot/share/runtime/objectMonitor.hpp	Tue May 07 10:21:04 2019 +0800
+++ b/src/hotspot/share/runtime/objectMonitor.hpp	Mon May 06 20:05:19 2019 -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