diff --git a/pkg/storage/lazyquery/lazyquery.go b/pkg/storage/lazyquery/lazyquery.go
index 80d157926cb..33b6b47501b 100644
--- a/pkg/storage/lazyquery/lazyquery.go
+++ b/pkg/storage/lazyquery/lazyquery.go
@@ -104,5 +104,8 @@ func (s *lazySeriesSet) Err() error {
 
 // Warnings implements storage.SeriesSet.
 func (s *lazySeriesSet) Warnings() annotations.Annotations {
-	return nil
+	if s.next == nil {
+		s.next = <-s.future
+	}
+	return s.next.Warnings()
 }