diff --git a/gtsam/inference/BayesTree.h b/gtsam/inference/BayesTree.h
index bd3b7db6a..143a2f0f5 100644
--- a/gtsam/inference/BayesTree.h
+++ b/gtsam/inference/BayesTree.h
@@ -91,7 +91,7 @@ namespace gtsam {
     typedef FastList<sharedClique> Cliques;
 
     /** Map from keys to Clique */
-    typedef tbb::concurrent_unordered_map<Key, sharedClique> Nodes;
+    typedef FastMap<Key, sharedClique> Nodes;
 
   protected: