diff --git a/mongoose/mongoose.d.ts b/mongoose/mongoose.d.ts
index 64bfd3d01e..ce4be964f4 100644
--- a/mongoose/mongoose.d.ts
+++ b/mongoose/mongoose.d.ts
@@ -135,7 +135,7 @@ declare module "mongoose" {
   }
 
   export interface Model<T extends Document> extends NodeJS.EventEmitter {
-    new(doc: Object): T;
+    new(doc?: Object): T;
 
     aggregate(...aggregations: Object[]): Aggregate<T[]>;
     aggregate(aggregation: Object, callback: (err: any, res: T[]) => void): Promise<T[]>;