diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.cpp
index 444e3bf46..025cb2627 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.cpp
@@ -62,7 +62,7 @@ void GLGizmoSlaBase::update_volumes()
         new_volume->set_instance_transformation(po->model_object()->instances[m_parent.get_selection().get_instance_idx()]->get_transformation());
         new_volume->set_sla_shift_z(po->get_current_elevation());
         new_volume->mesh_raycaster = std::make_unique<GUI::MeshRaycaster>(backend_mesh);
-        m_input_enabled = last_completed_step(*m_c->selection_info()->print_object()->print()) >= m_min_sla_print_object_step;
+        m_input_enabled = po->last_completed_step() >= m_min_sla_print_object_step;
         if (m_input_enabled)
             new_volume->selected = true; // to set the proper color
         else
@@ -127,16 +127,6 @@ void GLGizmoSlaBase::unregister_volume_raycasters_for_picking()
     m_volume_raycasters.clear();
 }
 
-int GLGizmoSlaBase::last_completed_step(const SLAPrint& sla)
-{
-    int step = -1;
-    for (int i = 0; i < (int)SLAPrintObjectStep::slaposCount; ++i) {
-        if (sla.is_step_done((SLAPrintObjectStep)i))
-            ++step;
-    }
-    return step;
-}
-
 // Unprojects the mouse position on the mesh and saves hit point and normal of the facet into pos_and_normal
 // Return false if no intersection was found, true otherwise.
 bool GLGizmoSlaBase::unproject_on_mesh(const Vec2d& mouse_pos, std::pair<Vec3f, Vec3f>& pos_and_normal)
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.hpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.hpp
index 9b5e9f469..438477598 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.hpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaBase.hpp
@@ -38,8 +38,6 @@ protected:
     bool is_input_enabled() const { return m_input_enabled; }
     int get_min_sla_print_object_step() const { return m_min_sla_print_object_step; }
 
-    static int last_completed_step(const SLAPrint& sla);
-
     bool unproject_on_mesh(const Vec2d& mouse_pos, std::pair<Vec3f, Vec3f>& pos_and_normal);
 
     const GLVolumeCollection &volumes() const { return m_volumes; }
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
index 4b449b3cc..0bab4020a 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
@@ -66,7 +66,7 @@ void GLGizmoSlaSupports::data_changed()
         m_c->instances_hider()->set_hide_full_scene(true);
         const SLAPrintObject* po = m_c->selection_info()->print_object();
         const int required_step = get_min_sla_print_object_step();
-        if (po != nullptr && last_completed_step(*po->print()) < required_step)
+        if (po != nullptr && po->last_completed_step() < required_step)
             reslice_until_step((SLAPrintObjectStep)required_step, false);
 
         update_volumes();