diff --git a/types/chance/index.d.ts b/types/chance/index.d.ts
index 10538b747c..fc5347e859 100644
--- a/types/chance/index.d.ts
+++ b/types/chance/index.d.ts
@@ -39,6 +39,7 @@ declare namespace Chance {
 
         // Person
         age(opts?: Options): number;
+        gender(): string;
         birthday(): Date;
         birthday(opts?: Options): Date|string;
         cpf(): string;