diff --git a/libsrc/meshing/python_mesh.cpp b/libsrc/meshing/python_mesh.cpp
index 04d00d10..b4c3f8d3 100644
--- a/libsrc/meshing/python_mesh.cpp
+++ b/libsrc/meshing/python_mesh.cpp
@@ -687,7 +687,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
     .def(py::init<>())
     .def("__init__",
          [](MP *instance, double maxh, bool quad_dominated, int optsteps2d, int optsteps3d,
-	    MESHING_STEP perfstepsend, int only3D_domain)
+	    MESHING_STEP perfstepsend, int only3D_domain, const string & meshsizefilename)
                            {
                              new (instance) MeshingParameters;
                              instance->maxh = maxh;
@@ -696,6 +696,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
                              instance->optsteps3d = optsteps3d;			     
 			     instance->only3D_domain_nr = only3D_domain;
                              instance->perfstepsend = perfstepsend;
+                             instance->meshsizefilename = meshsizefilename;
                            },
            py::arg("maxh")=1000,
            py::arg("quad_dominated")=false,
@@ -703,6 +704,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
 	 py::arg("optsteps3d") = 3,
 	 py::arg("perfstepsend") = MESHCONST_OPTVOLUME,
 	 py::arg("only3D_domain") = 0,
+         py::arg("meshsizefilename") = "",
          "create meshing parameters"
           )
     .def("__str__", &ToString<MP>)