diff --git a/moment/moment.d.ts b/moment/moment.d.ts
index 6037b0ef0a..d4abff0df9 100644
--- a/moment/moment.d.ts
+++ b/moment/moment.d.ts
@@ -258,6 +258,10 @@ interface Moment {
     lang(reset: boolean): Moment;
     lang(): MomentLanguage;
 
+    locale(language: string): Moment;
+    locale(reset: boolean): Moment;
+    locale(): string;
+
     localeData(language: string): Moment;
     localeData(reset: boolean): Moment;
     localeData(): MomentLanguage;