--- old/src/java.desktop/share/classes/javax/sound/sampled/AudioInputStream.java	2016-08-12 17:03:17.000000000 +0300
+++ new/src/java.desktop/share/classes/javax/sound/sampled/AudioInputStream.java	2016-08-12 17:03:17.000000000 +0300
@@ -60,7 +60,7 @@
      * The {@code InputStream} from which this {@code AudioInputStream} object
      * was constructed.
      */
-    private InputStream stream;
+    private final InputStream stream;
 
     /**
      * The format of the audio data contained in the stream.