diff --git a/python/handwritten/geometry/Point2.cpp b/python/handwritten/geometry/Point2.cpp
index 77abca636..f94d8ef1e 100644
--- a/python/handwritten/geometry/Point2.cpp
+++ b/python/handwritten/geometry/Point2.cpp
@@ -29,7 +29,7 @@ void exportPoint2(){
 
   class_<Point2>("Point2", init<>())
     .def(init<double, double>())
-    .def(init<Vector>())
+    .def(init<const Vector2 &>())
     .def("identity", &Point2::identity)
     .def("dist", &Point2::dist)
     .def("distance", &Point2::distance)
diff --git a/python/handwritten/geometry/Point3.cpp b/python/handwritten/geometry/Point3.cpp
index fd703f3ce..99adff5f2 100644
--- a/python/handwritten/geometry/Point3.cpp
+++ b/python/handwritten/geometry/Point3.cpp
@@ -29,7 +29,7 @@ void exportPoint3(){
 class_<Point3>("Point3")
   .def(init<>())
   .def(init<double,double,double>())
-  .def(init<Vector>())
+  .def(init<const Vector3 &>())
   .def("identity", &Point3::identity)
   .staticmethod("identity")
   .def("add", &Point3::add)
diff --git a/python/handwritten/geometry/Pose3.cpp b/python/handwritten/geometry/Pose3.cpp
index a7e3ae2fd..2257bab46 100644
--- a/python/handwritten/geometry/Pose3.cpp
+++ b/python/handwritten/geometry/Pose3.cpp
@@ -44,11 +44,11 @@ void exportPose3(){
   
   class_<Pose3>("Pose3")
     .def(init<>())
-    .def(init<Pose3>())
-    .def(init<Rot3,Point3>())
-    .def(init<Rot3,Vector3>())
-    .def(init<Pose2>())
-    .def(init<Matrix>())
+    .def(init<const Pose3 &>())
+    .def(init<const Rot3 &,const Point3 &>())
+    .def(init<const Rot3 &,const Vector3 &>())
+    .def(init<const Pose2 &>())
+    .def(init<const Matrix &>())
     .def("print", &Pose3::print, print_overloads(args("s")))
     .def("equals", &Pose3::equals, equals_overloads(args("pose","tol")))
     .def("identity", &Pose3::identity)
diff --git a/python/handwritten/geometry/Rot3.cpp b/python/handwritten/geometry/Rot3.cpp
index 8f1728214..8c82e5396 100644
--- a/python/handwritten/geometry/Rot3.cpp
+++ b/python/handwritten/geometry/Rot3.cpp
@@ -39,8 +39,8 @@ void exportRot3(){
     .def(init<>())
     .def(init<Point3,Point3,Point3>())
     .def(init<double,double,double,double,double,double,double,double,double>())
-    .def(init<Matrix3>())
-    .def(init<Matrix>())
+    .def(init<const Matrix3 &>())
+    .def(init<const Matrix &>())
     .def("AxisAngle", AxisAngle_0)
     .def("AxisAngle", AxisAngle_1)
     .staticmethod("AxisAngle")