diff --git a/mongoose/index.d.ts b/mongoose/index.d.ts
index 40821b8968..7ef5615436 100644
--- a/mongoose/index.d.ts
+++ b/mongoose/index.d.ts
@@ -2163,6 +2163,11 @@ declare module "mongoose" {
      * @param fields the field(s) to unwind
      */
     unwind(...fields: string[]): this;
+    /**
+     * Appends new custom $unwind operator(s) to this aggregate pipeline
+     * new in mongodb 3.2
+     */
+    unwind(...opts: { path: string, includeArrayIndex?: string, preserveNullAndEmptyArrays?: boolean }[]): this;
   }
 
   /*