diff --git a/pkg/rest/client/apiv1_client_opts.go b/pkg/rest/client/apiv1_client_opts.go
index 873db93..5b5b313 100644
--- a/pkg/rest/client/apiv1_client_opts.go
+++ b/pkg/rest/client/apiv1_client_opts.go
@@ -11,6 +11,7 @@ type options struct {
 	timeout   time.Duration
 }
 
+// Option can apply itself to the private options type.
 type Option interface {
 	apply(*options)
 }