diff --git a/packages/vite/types/customEvent.d.ts b/packages/vite/types/customEvent.d.ts
index aacf1554b0de75..af4db5d14fbe97 100644
--- a/packages/vite/types/customEvent.d.ts
+++ b/packages/vite/types/customEvent.d.ts
@@ -13,4 +13,4 @@ export interface CustomEventMap {
 }
 
 export type InferCustomEventPayload<T extends string> =
-  T extends keyof CustomEventMap ? CustomEventMap[T] : unknown
+  T extends keyof CustomEventMap ? CustomEventMap[T] : any