1 files changed, 2 insertions, 2 deletions
diff --git a/cli/tsc/dts/lib.es2021.intl.d.ts b/cli/tsc/dts/lib.es2021.intl.d.ts
index b464d55d6..ec90ad1b2 100644
--- a/cli/tsc/dts/lib.es2021.intl.d.ts
+++ b/cli/tsc/dts/lib.es2021.intl.d.ts
@@ -143,7 +143,7 @@ declare namespace Intl {
          *
          * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/ListFormat).
          */
-        new (locales?: BCP47LanguageTag | BCP47LanguageTag[], options?: ListFormatOptions): ListFormat;
+        new (locales?: LocalesArgument, options?: ListFormatOptions): ListFormat;
 
         /**
          * Returns an array containing those of the provided locales that are
@@ -161,6 +161,6 @@ declare namespace Intl {
          *
          * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/ListFormat/supportedLocalesOf).
          */
-        supportedLocalesOf(locales: BCP47LanguageTag | BCP47LanguageTag[], options?: Pick<ListFormatOptions, "localeMatcher">): BCP47LanguageTag[];
+        supportedLocalesOf(locales: LocalesArgument, options?: Pick<ListFormatOptions, "localeMatcher">): UnicodeBCP47LocaleIdentifier[];
     };
 }