src/java.base/share/classes/java/lang/reflect/Proxy.java

@@ -306,10 +306,11 @@
 
     /**
      * the invocation handler for this proxy instance.
      * @serial
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     protected InvocationHandler h;
 
     /**
      * Prohibits instantiation.
      */