diff --git a/gtsam/inference/ClusterTree-inst.h b/gtsam/inference/ClusterTree-inst.h
index 98cc61311..9bc141955 100644
--- a/gtsam/inference/ClusterTree-inst.h
+++ b/gtsam/inference/ClusterTree-inst.h
@@ -148,15 +148,9 @@ struct EliminationData {
     }
     // Set up BayesTree parent and child pointers
     if (parentData) {
-#ifdef GTSAM_USE_TBB
-      parentData->writeLock->lock();
-#endif
       if (parentData->parentData) // If our parent is not the dummy node
         bayesTreeNode->parent_ = parentData->bayesTreeNode;
       parentData->bayesTreeNode->children.push_back(bayesTreeNode);
-#ifdef GTSAM_USE_TBB
-      parentData->writeLock->unlock();
-#endif
     }
   }