--- a/jdk/src/java.desktop/share/classes/javax/sound/sampled/CompoundControl.java	Fri Aug 12 14:35:56 2016 -0700
+++ b/jdk/src/java.desktop/share/classes/javax/sound/sampled/CompoundControl.java	Mon Aug 15 20:08:55 2016 +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.