diff --git a/chord/id.go b/chord/id.go
index 5e82235..37e49d0 100644
--- a/chord/id.go
+++ b/chord/id.go
@@ -57,6 +57,6 @@ func ParseID(s string) (ID, error) {
 		return ID{}, errors.New("invalid ID")
 	}
 	var id ID
-	_, err := hex.AppendDecode(id[:], []byte(s))
+	_, err := hex.AppendDecode(id[:0], []byte(s))
 	return id, err
 }