diff --git a/cmd/prometheus/main.go b/cmd/prometheus/main.go
index 06d5540380..86c12f04bc 100644
--- a/cmd/prometheus/main.go
+++ b/cmd/prometheus/main.go
@@ -875,7 +875,7 @@ func main() {
 		&cfg.scrape,
 		logger.With("component", "scrape manager"),
 		logging.NewJSONFileLogger,
-		fanoutStorage, nil, // TODO(bwplotka): Switch to AppendableV2.
+		nil, fanoutStorage,
 		prometheus.DefaultRegisterer,
 	)
 	if err != nil {