diff --git a/packages/interface/src/event-target.ts b/packages/interface/src/event-target.ts
index f09d127ef4..de967c61ff 100644
--- a/packages/interface/src/event-target.ts
+++ b/packages/interface/src/event-target.ts
@@ -105,22 +105,4 @@ export class TypedEventEmitter<EventMap extends Record<string, any>> extends Eve
   }
 }
 
-/**
- * CustomEvent is a standard event but it's not supported by node.
- *
- * Remove this when https://github.com/nodejs/node/issues/40678 is closed.
- *
- * Ref: https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent
- */
-class CustomEventPolyfill<T = any> extends Event {
-  /** Returns any custom data event was created with. Typically used for synthetic events. */
-  public detail: T
-
-  constructor (message: string, data?: EventInit & { detail: T }) {
-    super(message, data)
-    // @ts-expect-error could be undefined
-    this.detail = data?.detail
-  }
-}
-
-export const CustomEvent = globalThis.CustomEvent ?? CustomEventPolyfill
+export const CustomEvent = globalThis.CustomEvent