--- old/src/hotspot/share/gc/z/zAddressRangeMap.hpp	2018-01-17 11:44:01.551379015 +0900
+++ new/src/hotspot/share/gc/z/zAddressRangeMap.hpp	2018-01-17 11:44:01.404376506 +0900
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -31,6 +31,7 @@
 
 template <typename T, size_t AddressRangeShift>
 class ZAddressRangeMap VALUE_OBJ_CLASS_SPEC {
+  friend class VMStructs;
   friend class ZAddressRangeMapIterator<T, AddressRangeShift>;
 
 private: