diff --git a/gtsam/linear/GaussianBayesTree.cpp b/gtsam/linear/GaussianBayesTree.cpp
index 53b4ac6e5..e56cead6a 100644
--- a/gtsam/linear/GaussianBayesTree.cpp
+++ b/gtsam/linear/GaussianBayesTree.cpp
@@ -32,7 +32,7 @@ namespace gtsam {
     /* ************************************************************************* */
     struct OptimizeData {
       boost::optional<OptimizeData&> parentData;
-      VectorValues ancestorResults;
+      //VectorValues ancestorResults;
       //VectorValues results;
     };