diff --git a/tutorials/international/index.md b/tutorials/international/index.md
index 92107c5..74169f8 100644
--- a/tutorials/international/index.md
+++ b/tutorials/international/index.md
@@ -186,7 +186,7 @@ class DemoLocalizations {
   static Future<DemoLocalizations> load(Locale locale) {
     final String name = locale.countryCode.isEmpty ? locale.languageCode : locale.toString();
     final String localeName = Intl.canonicalizedLocale(name);
-    return initializeMessages(localeName).then((Null _) {
+    return initializeMessages(localeName).then((_) {
       Intl.defaultLocale = localeName;
       return new DemoLocalizations();
     });