--- old/src/java.desktop/share/classes/com/sun/media/sound/MidiInDevice.java	2016-05-17 17:13:13.000000000 +0300
+++ new/src/java.desktop/share/classes/com/sun/media/sound/MidiInDevice.java	2016-05-17 17:13:13.000000000 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 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
@@ -38,7 +38,7 @@
  */
 final class MidiInDevice extends AbstractMidiDevice implements Runnable {
 
-    private Thread midiInThread = null;
+    private volatile Thread midiInThread;
 
     // CONSTRUCTOR