diff --git a/metricflow/dataflow/builder/dataflow_plan_builder.py b/metricflow/dataflow/builder/dataflow_plan_builder.py
index 2fdc8147cd..c5bb2a5469 100644
--- a/metricflow/dataflow/builder/dataflow_plan_builder.py
+++ b/metricflow/dataflow/builder/dataflow_plan_builder.py
@@ -560,7 +560,7 @@ def _find_measure_recipe(
         if len(node_to_evaluation) > 0:
             # All source nodes cost the same. Get evaluation with lowest number of joins.
             node_with_lowest_evaluation_cost = min(
-                node_to_evaluation, key=lambda x: len(node_to_evaluation[x].join_recipes)
+                node_to_evaluation, key=lambda node: len(node_to_evaluation[node].join_recipes)
             )
             evaluation = node_to_evaluation[node_with_lowest_evaluation_cost]
             logger.info(