diff --git a/unilabos/ros/nodes/base_device_node.py b/unilabos/ros/nodes/base_device_node.py
index a2f51e7a..f1063123 100644
--- a/unilabos/ros/nodes/base_device_node.py
+++ b/unilabos/ros/nodes/base_device_node.py
@@ -593,7 +593,7 @@ class BaseROS2DeviceNode(Node, Generic[T]):
                     site = additional_add_params.get("site", None)
                     spec = inspect.signature(parent_resource.assign_child_resource)
                     if "spot" in spec.parameters:
-                        ordering_dict: Dict[str, Any] = getattr(plr_resource, "_ordering")
+                        ordering_dict: Dict[str, Any] = getattr(parent_resource, "_ordering")
                         if ordering_dict:
                             site = list(ordering_dict.keys()).index(site)
                         additional_params["spot"] = site