src/java.base/share/classes/sun/net/www/protocol/http/NegotiateAuthentication.java

@@ -43,10 +43,11 @@
  * @since 1.6
  */
 
 class NegotiateAuthentication extends AuthenticationInfo {
 
+    @java.io.Serial
     private static final long serialVersionUID = 100L;
     private static final PlatformLogger logger = HttpURLConnection.getHttpLogger();
 
     private final HttpCallerInfo hci;