diff --git a/src/libslic3r/SLAPrintSteps.cpp b/src/libslic3r/SLAPrintSteps.cpp
index b3e47fe14..630f6f85f 100644
--- a/src/libslic3r/SLAPrintSteps.cpp
+++ b/src/libslic3r/SLAPrintSteps.cpp
@@ -415,8 +415,8 @@ static void filter_support_points_by_modifiers(sla::SupportPoints &pts,
                                                const SuppPtMask &mask,
                                                const std::vector<float> &slice_grid)
 {
-    assert((blockers.empty() || blockers.size() == slice_grid.size()) &&
-           (enforcers.empty() || enforcers.size() == slice_grid.size()));
+    assert((mask.blockers.empty() || mask.blockers.size() == slice_grid.size()) &&
+           (mask.enforcers.empty() || mask.enforcers.size() == slice_grid.size()));
 
     auto new_pts = reserve_vector<sla::SupportPoint>(pts.size());
 
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index f3eae5633..734f6140e 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -6133,7 +6133,7 @@ void Plater::export_stl_obj(bool extended, bool selection_only)
             for (const SLAPrintObject::Instance& obj_instance : obj_instances) {
                 auto it = std::find_if(object->model_object()->instances.begin(), object->model_object()->instances.end(),
                                        [&obj_instance](const ModelInstance *mi) { return mi->id() == obj_instance.instance_id; });
-                assert(it != model_object->instances.end());
+                assert(it != object->model_object()->instances.end());
 
                 if (it != object->model_object()->instances.end()) {
                     const bool one_inst_only = selection_only && ! selection.is_single_full_object();