--- old/src/java.desktop/share/classes/sun/awt/EmbeddedFrame.java	2019-09-21 12:30:27.551000000 -0700
+++ new/src/java.desktop/share/classes/sun/awt/EmbeddedFrame.java	2019-09-21 12:30:27.343000000 -0700
@@ -56,6 +56,7 @@
 
     private boolean isCursorAllowed = true;
     private boolean supportsXEmbed = false;
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private KeyboardFocusManager appletKFM;
     // JDK 1.1 compatibility
     private static final long serialVersionUID = 2967042741780317130L;