diff --git a/bin/src/graph.dart b/bin/src/graph.dart
index 95491e3..581b7b6 100644
--- a/bin/src/graph.dart
+++ b/bin/src/graph.dart
@@ -83,7 +83,7 @@ class Dot {
   Dot.clone(Dot a) {
     _name = a.getName();
     num = a.num;
-    _ln = a._ln;
+    _ln = a.getL();
   }
 }