diff --git a/python/gtsam/gtsam.tpl b/python/gtsam/gtsam.tpl
index 0e0881ce9..b800f7c35 100644
--- a/python/gtsam/gtsam.tpl
+++ b/python/gtsam/gtsam.tpl
@@ -13,6 +13,7 @@
 #include <pybind11/eigen.h>
 #include <pybind11/stl_bind.h>
 #include <pybind11/pybind11.h>
+#include <pybind11/operators.h>
 #include <pybind11/functional.h>
 #include <pybind11/iostream.h>
 #include "gtsam/config.h"