diff --git a/types/connect-mongo/connect-mongo-tests.ts b/types/connect-mongo/connect-mongo-tests.ts
index a512d7dc71..67caed7c27 100644
--- a/types/connect-mongo/connect-mongo-tests.ts
+++ b/types/connect-mongo/connect-mongo-tests.ts
@@ -43,3 +43,11 @@ app.use(session({
     secret: 'secret',
     store: new MongoStore({db: mongoDb})
 }));
+
+// NativeMongoPromiseOptions
+var Client = mongodb.MongoClient;
+var mongoDbPromise = Client.connect('mongodb://localhost/test');
+app.use(session({
+    secret: 'secret',
+    store: new MongoStore({ dbPromise: mongoDbPromise})
+}));
diff --git a/types/connect-mongo/index.d.ts b/types/connect-mongo/index.d.ts
index 0b7443f7e1..6f71906fa5 100644
--- a/types/connect-mongo/index.d.ts
+++ b/types/connect-mongo/index.d.ts
@@ -91,14 +91,16 @@ declare namespace connectMongo {
         mongooseConnection: mongoose.Connection;
     }
 
-    export interface NaitiveMongoOptions extends DefaultOptions {
+    export interface NativeMongoOptions extends DefaultOptions {
         db: mongodb.Db;
     }
 
+    export interface NativeMongoPromiseOptions extends DefaultOptions {
+        dbPromise: Promise<mongodb.Db>;
+    }
+
     export interface MongoStoreFactory {
-        new (options: MongoUrlOptions): MongoStore;
-        new (options: MogooseConnectionOptions): MongoStore;
-        new (options: NaitiveMongoOptions): MongoStore;
+        new(options: MongoUrlOptions | MogooseConnectionOptions | NativeMongoOptions | NativeMongoPromiseOptions): MongoStore;
     }
 
     export class MongoStore extends session.Store {