diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index 9a89b8928c..b3a5d7e682 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -2354,6 +2354,12 @@ declare module "mongoose" {
      */
     cursor(options: any): this;
 
+    /**
+     * Appends a new $facet operator to this aggregate pipeline.
+     * @param arg $facet operator contents
+     */
+    facet(arg: { [outputField: string]: object[] }): this;
+
     // If cursor option is on, could return an object
     /** Executes the aggregate pipeline on the currently bound Model. */
     exec(callback?: (err: any, result: T) => void): Promise<T> | any;
diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index ca06ec8655..83f6f226b5 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -1237,6 +1237,7 @@ aggregate.append({ $project: { field: 1 }}, { $limit: 2 });
 aggregate.append([{ $match: { daw: 'Logic Audio X' }} ]);
 aggregate.collation({ locale: 'en_US', strength: 1 });
 aggregate.count('countName');
+aggregate.facet({ fieldA: [{ a: 1 }], fieldB: [{ b: 1 }] });
 aggregate.cursor({ batchSize: 1000 }).exec().each(cb);
 aggregate.exec().then(cb).catch(cb);
 aggregate.option({foo: 'bar'}).exec();