--- old/src/share/vm/utilities/ostream.hpp	2016-01-20 15:36:05.175895831 -0500
+++ new/src/share/vm/utilities/ostream.hpp	2016-01-20 15:36:05.067895296 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, 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
@@ -27,6 +27,7 @@
 
 #include "memory/allocation.hpp"
 #include "runtime/timer.hpp"
+#include "utilities/globalDefinitions.hpp"
 
 class GCId;
 DEBUG_ONLY(class ResourceMark;)
@@ -236,7 +237,7 @@
 class logStream : public outputStream {
 private:
   stringStream _current_line;
-  void (*_log_func)(const char* fmt, ...);
+  void (*_log_func)(const char* fmt, ...) ATTRIBUTE_PRINTF(1, 2);
 public:
   void write(const char* s, size_t len);
   logStream(void (*log_func)(const char* fmt, ...)) : _log_func(log_func) {}