Argument type declaration error on the handler side when using defineEmits + Typescript + setup script

[Shujee]

I'm using Vue 3.3+ syntax for defining my emits:

const emit = defineEmits<{
  ItemClicked: [args: { url: string | undefined, index: number }]
}>()

But when I try to attach a handler function to this emit:

<my-component @ItemClicked="showItem" />

const showItem = (args: { url: string | undefined, index: number }) => {
  //...
}

Typescript keeps show the following error:

Type '(args: { url: string | undefined;    index: number;}) => void' is not assignable to type '($event?: undefined) => any'.
  Types of parameters 'args' and '$event' are incompatible.ts(2322)

My Vue version is 3.4.21 and Typescript is 5.4.2.