--- old/src/java.desktop/share/classes/javax/sound/sampled/LineEvent.java	2019-09-21 12:30:27.019000000 -0700
+++ new/src/java.desktop/share/classes/javax/sound/sampled/LineEvent.java	2019-09-21 12:30:26.815000000 -0700
@@ -60,6 +60,7 @@
      * @see #getType
      * @serial
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private final Type type;
 
     /**