diff --git a/@types/interfaces.d.ts b/@types/interfaces.d.ts
index 610a40b26..1ce41727c 100644
--- a/@types/interfaces.d.ts
+++ b/@types/interfaces.d.ts
@@ -1,6 +1,6 @@
 import { ComboBoxElement } from '../src/vaadin-combo-box.js';
 
-export type ComboBoxItem = { [key: string]: unknown };
+export type ComboBoxItem = unknown;
 
 export interface ComboBoxItemModel {
   index: number;