diff --git a/python/gtsam/preamble/hybrid.h b/python/gtsam/preamble/hybrid.h
index 7008a1f07..661215e59 100644
--- a/python/gtsam/preamble/hybrid.h
+++ b/python/gtsam/preamble/hybrid.h
@@ -11,12 +11,3 @@
  * mutations on Python side will not be reflected on C++.
  */
 #include <pybind11/stl.h>
-
-#ifdef GTSAM_ALLOCATOR_TBB
-PYBIND11_MAKE_OPAQUE(std::vector<gtsam::Key, tbb::tbb_allocator<gtsam::Key>>);
-#else
-PYBIND11_MAKE_OPAQUE(std::vector<gtsam::Key>);
-#endif
-
-PYBIND11_MAKE_OPAQUE(std::vector<gtsam::GaussianFactor::shared_ptr>);
-PYBIND11_MAKE_OPAQUE(std::vector<gtsam::GaussianConditional::shared_ptr>);
diff --git a/python/gtsam/specializations/hybrid.h b/python/gtsam/specializations/hybrid.h
index db5240117..8b1378917 100644
--- a/python/gtsam/specializations/hybrid.h
+++ b/python/gtsam/specializations/hybrid.h
@@ -1,6 +1 @@
 
-py::bind_vector<std::vector<gtsam::GaussianFactor::shared_ptr> >(m_, "GaussianFactorVector");
-py::implicitly_convertible<py::list, std::vector<gtsam::GaussianFactor::shared_ptr> >();
-
-py::bind_vector<std::vector<gtsam::GaussianConditional::shared_ptr> >(m_, "GaussianConditionalVector");
-py::implicitly_convertible<py::list, std::vector<gtsam::GaussianConditional::shared_ptr> >();