diff --git a/share/transform/chain/links.py b/share/transform/chain/links.py
index 040f8d4f1..59f5276fc 100644
--- a/share/transform/chain/links.py
+++ b/share/transform/chain/links.py
@@ -272,7 +272,7 @@ def __add__(self, step):
         return AnchorLink() + step
 
     def __radd__(self, other):
-        raise NotImplementedError
+        return NotImplemented
 
     def __setattr__(self, name, value):
         if not hasattr(Context.__CONTEXT, '_ctxdict'):