diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index cb8ca38408..da4714d59f 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -2435,6 +2435,7 @@ declare module "mongoose" {
      * If a callback is not passed, the aggregate itself is returned.
      * @param aggregations pipeline operator(s) or operator array
      */
+    aggregate(): Aggregate<any[]>;
     aggregate(aggregations: any[]): Aggregate<any[]>;
     aggregate(aggregations: any[], cb: Function): Promise<any[]>;