diff --git a/python/gtsam/preamble/inference.h b/python/gtsam/preamble/inference.h
index d07a75f6fb..4106c794ac 100644
--- a/python/gtsam/preamble/inference.h
+++ b/python/gtsam/preamble/inference.h
@@ -10,3 +10,5 @@
  * Without this they will be automatically converted to a Python object, and all
  * mutations on Python side will not be reflected on C++.
  */
+
+#include <pybind11/stl.h>
\ No newline at end of file