diff --git a/types/bson/index.d.ts b/types/bson/index.d.ts
index 517ed8ede9..e34462b2b7 100644
--- a/types/bson/index.d.ts
+++ b/types/bson/index.d.ts
@@ -68,6 +68,8 @@ export class ObjectId {
     static isValid(id: number | string | ObjectId): boolean;
 
     constructor(id?: number | string | ObjectId);
+    toHexString(): string;
+    getTimestamp(): Date;
 }
 export type ObjectID = ObjectId;
 export class BSONRegExp {