diff -r 17d568776429 -r 259c36ef27df src/hotspot/share/runtime/osThread.hpp
--- a/src/hotspot/share/runtime/osThread.hpp	Fri Jan 04 20:58:35 2019 +0100
+++ b/src/hotspot/share/runtime/osThread.hpp	Fri Jan 04 15:06:01 2019 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, 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
@@ -53,6 +53,8 @@
   ZOMBIE                        // All done, but not reclaimed yet
 };
 
+typedef int (*OSThreadStartFunc)(void*);
+
 class OSThread: public CHeapObj<mtThread> {
   friend class VMStructs;
   friend class JVMCIVMStructs;