--- a/src/hotspot/share/runtime/stackValue.hpp	Fri Jan 04 20:58:35 2019 +0100
+++ b/src/hotspot/share/runtime/stackValue.hpp	Fri Jan 04 15:06:01 2019 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, 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
@@ -28,6 +28,10 @@
 #include "code/location.hpp"
 #include "runtime/handles.hpp"
 
+class BasicLock;
+class RegisterMap;
+class ScopeValue;
+
 class StackValue : public ResourceObj {
  private:
   BasicType _type;