diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index cd1166f71a..3fa4b4c022 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -5555,6 +5555,8 @@ void Plater::export_stl_obj(bool extended, bool selection_only)
             TriangleMesh vols_mesh(mesh);
             mesh = TriangleMesh();
             for (const ModelInstance* i : mo.instances) {
+                if (!i->is_printable())
+                    continue;
                 TriangleMesh m = vols_mesh;
                 m.transform(i->get_matrix(), true);
                 mesh.merge(m);
@@ -5570,8 +5572,10 @@ void Plater::export_stl_obj(bool extended, bool selection_only)
 
         const SLAPrintObject *object = this->p->sla_print.get_print_object_by_model_object_id(mo.id());
 
-        if (!object || !object->get_mesh_to_print() || object->get_mesh_to_print()->empty())
-            mesh = mesh_to_export_fff(mo, instance_id);
+        if (!object || !object->get_mesh_to_print() || object->get_mesh_to_print()->empty()) {
+            if (!extended)
+                mesh = mesh_to_export_fff(mo, instance_id);
+        }
         else {
             const Transform3d mesh_trafo_inv = object->trafo().inverse();
             const bool is_left_handed = object->is_left_handed();