--- old/src/java.desktop/share/classes/javax/sound/sampled/CompoundControl.java	2016-08-12 17:03:18.000000000 +0300
+++ new/src/java.desktop/share/classes/javax/sound/sampled/CompoundControl.java	2016-08-12 17:03:18.000000000 +0300
@@ -38,7 +38,7 @@
     /**
      * The set of member controls.
      */
-    private Control[] controls;
+    private final Control[] controls;
 
     /**
      * Constructs a new compound control object with the given parameters.