diff --git a/nameserver.go b/nameserver.go
index 5532eb9..c6f801d 100644
--- a/nameserver.go
+++ b/nameserver.go
@@ -77,6 +77,8 @@ func generateQuery(entry *RRConfig, addr net.IP) string {
 }
 
 func executeQuery(query string) error {
+	// TODO: use either nsupdate or knsupdate, both should work
+	// (or don't rely on external tools at all)
 	cmd := exec.Command("knsupdate", "-v")
 	cmd.Stdin = strings.NewReader(query)
 	output, err := cmd.CombinedOutput()