diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 5f83117c4..ecf31e8f3 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -309,6 +309,7 @@ sub load_file {
                     : [0,0],
             ],
         );
+        $object->mesh->check_manifoldness;
         
         # we only consider the rotation of the first instance for now
         $object->set_rotation($model->objects->[$i]->instances->[0]->rotation)