diff --git a/libsrc/occ/python_occ_shapes.cpp b/libsrc/occ/python_occ_shapes.cpp
index a6d76c8f..641a2213 100644
--- a/libsrc/occ/python_occ_shapes.cpp
+++ b/libsrc/occ/python_occ_shapes.cpp
@@ -982,7 +982,9 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
         return CastShape(shape.Reversed()); })
 
     .def("Extrude", [](const TopoDS_Shape & shape, double h,
-                       optional<gp_Vec> dir) {
+                       optional<gp_Vec> dir, bool identify,
+                       Identifications::ID_TYPE idtype)
+    {
         for (TopExp_Explorer e(shape, TopAbs_FACE); e.More(); e.Next())
           {
             Handle(Geom_Surface) surf = BRep_Tool::Surface (TopoDS::Face(e.Current()));
@@ -996,7 +998,7 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
                 surf->D1 (0,0,p,du,dv);
                 edir = du^dv;
               }
-            BRepPrimAPI_MakePrism builder(shape, h*edir, true);
+            BRepPrimAPI_MakePrism builder(shape, h*edir, false);
 
             for (auto typ : { TopAbs_SOLID, TopAbs_FACE, TopAbs_EDGE, TopAbs_VERTEX })
               for (TopExp_Explorer e(shape, typ); e.More(); e.Next())
@@ -1005,11 +1007,17 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
                   for (auto mods : builder.Generated(e.Current()))
                     OCCGeometry::GetProperties(mods).Merge(prop);
                 }
-            
+            if(identify)
+              {
+                Transformation<3> trsf(h * occ2ng(edir));
+                Identify(GetFaces(shape), GetFaces(builder.LastShape()),
+                         "extrusion_cs", idtype, trsf);
+            }
             return builder.Shape();
           }
         throw Exception("no face found for extrusion");
-    }, py::arg("h"), py::arg("dir")=nullopt, "extrude shape to thickness 'h', shape must contain a plane surface, optionally give an extrusion direction")
+    }, py::arg("h"), py::arg("dir")=nullopt, py::arg("identify")=false,
+         py::arg("idtype")=Identifications::CLOSESURFACES, "extrude shape to thickness 'h', shape must contain a plane surface, optionally give an extrusion direction")
     
     .def("Extrude", [] (const TopoDS_Shape & face, gp_Vec vec) {
         return BRepPrimAPI_MakePrism (face, vec).Shape();