diff --git a/ot/label.go b/ot/label.go
index 554d7970..d9b636e1 100644
--- a/ot/label.go
+++ b/ot/label.go
@@ -1,7 +1,7 @@
 //
 // label.go
 //
-// Copyright (c) 2019-2023 Markku Rossi
+// Copyright (c) 2019-2024 Markku Rossi
 //
 // All rights reserved.
 //
@@ -20,6 +20,10 @@ type Wire struct {
 	L1 Label
 }
 
+func (w Wire) String() string {
+	return fmt.Sprintf("%s/%s", w.L0, w.L1)
+}
+
 // Label implements a 128 bit wire label.
 type Label struct {
 	D0 uint64