diff --git a/packages/service-worker/worker/src/data.ts b/packages/service-worker/worker/src/data.ts
index 85e797c91c..3b476111c9 100644
--- a/packages/service-worker/worker/src/data.ts
+++ b/packages/service-worker/worker/src/data.ts
@@ -354,10 +354,11 @@ export class DataGroup {
 
       // Cache the network response eventually.
       ctx.waitUntil(this.safeCacheResponse(req, networkFetch));
+    } else {
+      // The request completed in time, so cache it inline with the response flow.
+      await this.cacheResponse(req, res, lru);
     }
 
-    // The request completed in time, so cache it inline with the response flow.
-    await this.cacheResponse(req, res, lru);
     return res;
   }