diff --git a/broker/client/reader.go b/broker/client/reader.go
index 6850aeed..ee76e8ed 100644
--- a/broker/client/reader.go
+++ b/broker/client/reader.go
@@ -448,7 +448,7 @@ type gcsBackend struct {
 }
 
 // Arize Open routine with offset for use with consumers and signed URLs.
-func openWithOffset(ctx context.Context, ep *url.URL, fragment pb.Fragment, offset int64) (io.ReadCloser, error) {
+func (s *gcsBackend) openWithOffset(ctx context.Context, ep *url.URL, fragment pb.Fragment, offset int64) (io.ReadCloser, error) {
 	cfg, gClient, _, err := s.gcsClient(ep)
 	if err != nil {
 		return nil, err