diff --git a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java
index 99e6d0a41a..333721d570 100644
--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlConfiguration.java
@@ -661,7 +661,7 @@ public boolean process(String opt,  List<String> args) {
                     return true;
                 }
             },
-            new Option(resources, "--legal-notices", 1) {
+            new XOption(resources, "--legal-notices", 1) {
                 @Override
                 public boolean process(String opt,  List<String> args) {
                     legalnotices = args.get(0);