diff --git a/types/backbone/index.d.ts b/types/backbone/index.d.ts
index f151b2f42e..e2abd94568 100644
--- a/types/backbone/index.d.ts
+++ b/types/backbone/index.d.ts
@@ -229,6 +229,7 @@ declare namespace Backbone {
          **/
         get(id: number|string|Model): TModel;
         has(key: number|string|Model): boolean;
+        clone(): Collection<TModel>;
         create(attributes: any, options?: ModelSaveOptions): TModel;
         pluck(attribute: string): any[];
         push(model: TModel, options?: AddOptions): TModel;