diff --git a/packages/core/src/router.ts b/packages/core/src/router.ts
index 2f8cb605d..209639104 100644
--- a/packages/core/src/router.ts
+++ b/packages/core/src/router.ts
@@ -187,7 +187,7 @@ export class Router {
     return prefetchedRequests.findInFlight(this.getPrefetchParams(href, options))
   }
 
-  public prefetch(href: string | URL, options: VisitOptions = {}, { cacheFor = 30 }: PrefetchOptions) {
+  public prefetch(href: string | URL, options: VisitOptions = {}, { cacheFor = 30_000 }: PrefetchOptions) {
     if (options.method !== 'get') {
       throw new Error('Prefetch requests must use the GET method')
     }