--- old/src/java.desktop/share/classes/java/awt/Event.java	2019-09-21 12:30:13.999000000 -0700
+++ new/src/java.desktop/share/classes/java/awt/Event.java	2019-09-21 12:30:13.767000000 -0700
@@ -455,6 +455,7 @@
      * @serial
      * @see java.awt.AWTEvent#getSource()
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     public Object target;
 
     /**
@@ -537,6 +538,7 @@
      *
      * @serial
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     public Object arg;
 
     /**