diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 1cb1ca4f3..23e974a55 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -1944,9 +1944,9 @@ void GLCanvas3D::reload_scene(bool refresh_immediately, bool force_full_scene_re
         // Shift-up all volumes of the object so that it has the right elevation with respect to the print bed
         for (GLVolume* volume : m_volumes.volumes)
             if (volume->object_idx() < (int)m_model->objects.size() && m_model->objects[volume->object_idx()]->instances[volume->instance_idx()]->is_printable()) {
-                const SLAPrintObject *po = sla_print()->objects()[volume->object_idx()];
-                float zoffs = po->get_current_elevation() / sla_print()->relative_correction().z();
-                volume->set_sla_shift_z(zoffs);
+                const SLAPrintObject* po = sla_print()->get_print_object_by_model_object_id(volume->object_idx());
+                if (po != nullptr)
+                    volume->set_sla_shift_z(po->get_current_elevation() / sla_print()->relative_correction().z());
             }
     }