diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 165fc24fae..517185b55a 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -2000,7 +2000,7 @@ declare module "mongoose" {
      * getters/setters or other Mongoose magic applied.
      * @param {Boolean|Object} bool defaults to true
      */
-    lean<T>(bool?: boolean | object): Query<T> & QueryHelpers;
+    lean<P = any>(bool?: boolean | object): Query<T extends Array<any> ? P[] : (P | null)> & QueryHelpers;
 
     /** Specifies the maximum number of documents the query will return. Cannot be used with distinct() */
     limit(val: number): this;