diff --git a/packages/router/src/events.ts b/packages/router/src/events.ts
index 04bf15d8ba2..f9825a83152 100644
--- a/packages/router/src/events.ts
+++ b/packages/router/src/events.ts
@@ -58,7 +58,7 @@ export const enum EventType {
  * class MyService {
  *   constructor(public router: Router) {
  *     router.events.pipe(
- *        filter((e: Event): e is RouterEvent => e instanceof RouterEvent)
+ *        filter((e: Event | RouterEvent): e is RouterEvent => e instanceof RouterEvent)
  *     ).subscribe((e: RouterEvent) => {
  *       // Do something
  *     });