diff --git a/unittest/python/serialization_examples.py b/unittest/python/serialization_examples.py
index 8cf3dba..7f0e68a 100644
--- a/unittest/python/serialization_examples.py
+++ b/unittest/python/serialization_examples.py
@@ -1,6 +1,8 @@
 import pathlib
 import unittest
 
+import curves  # noqa: requiered to get C++ type exposition
+
 import pinocchio as pin
 from multicontact_api import ContactSequence