diff --git a/gtsam/hybrid/tests/testSerializationHybrid.cpp b/gtsam/hybrid/tests/testSerializationHybrid.cpp
index 3be96b751..af4a81fdf 100644
--- a/gtsam/hybrid/tests/testSerializationHybrid.cpp
+++ b/gtsam/hybrid/tests/testSerializationHybrid.cpp
@@ -44,6 +44,8 @@ BOOST_CLASS_EXPORT_GUID(HybridFactor, "gtsam_HybridFactor");
 BOOST_CLASS_EXPORT_GUID(JacobianFactor, "gtsam_JacobianFactor");
 BOOST_CLASS_EXPORT_GUID(GaussianConditional, "gtsam_GaussianConditional");
 BOOST_CLASS_EXPORT_GUID(DiscreteConditional, "gtsam_DiscreteConditional");
+BOOST_CLASS_EXPORT_GUID(TableDistribution,
+                        "gtsam_TableDistribution");
 
 BOOST_CLASS_EXPORT_GUID(DecisionTreeFactor, "gtsam_DecisionTreeFactor");
 using ADT = AlgebraicDecisionTree<Key>;