diff --git a/expo/experimenter/mcts.py b/expo/experimenter/mcts.py
index e06169a70..f0db72841 100644
--- a/expo/experimenter/mcts.py
+++ b/expo/experimenter/mcts.py
@@ -22,6 +22,7 @@ class MCTSExperimenter(Experimenter):
             state=self.state,
             reflection=self.args.reflection,
             rollouts=self.args.rollouts,
+            load_tree=self.args.load_tree,
         )
         best_node = best_nodes["global_best"]
         dev_best_node = best_nodes["dev_best"]