diff --git a/src/libslic3r/CutUtils.cpp b/src/libslic3r/CutUtils.cpp
index 8611ec302d..eff267588c 100644
--- a/src/libslic3r/CutUtils.cpp
+++ b/src/libslic3r/CutUtils.cpp
@@ -566,17 +566,17 @@ const ModelObjectPtrs& Cut::perform_with_groove(const Groove& groove, const Tran
     };
 
     // cut by upper plane
-
-    const Transform3d cut_matrix_upper = translation_transform(rotation_m * (groove_half_depth * Vec3d::UnitZ())) * m_cut_matrix;
     {
+        const Transform3d cut_matrix_upper = translation_transform(rotation_m * (groove_half_depth * Vec3d::UnitZ())) * m_cut_matrix;
+
         cut(tmp_object, cut_matrix_upper, ModelObjectCutAttribute::KeepLower, tmp_model_for_cut);
         add_volumes_from_cut(upper, ModelObjectCutAttribute::KeepUpper, tmp_model_for_cut);
     }
 
     // cut by lower plane
-
-    const Transform3d cut_matrix_lower = translation_transform(rotation_m * (-groove_half_depth * Vec3d::UnitZ())) * m_cut_matrix;
     {
+        const Transform3d cut_matrix_lower = translation_transform(rotation_m * (-groove_half_depth * Vec3d::UnitZ())) * m_cut_matrix;
+
         cut(tmp_object, cut_matrix_lower, ModelObjectCutAttribute::KeepUpper, tmp_model_for_cut);
         add_volumes_from_cut(lower, ModelObjectCutAttribute::KeepLower, tmp_model_for_cut);
     }
diff --git a/src/libslic3r/TriangleMeshSlicer.cpp b/src/libslic3r/TriangleMeshSlicer.cpp
index 150c456b8b..2c1c0da23f 100644
--- a/src/libslic3r/TriangleMeshSlicer.cpp
+++ b/src/libslic3r/TriangleMeshSlicer.cpp
@@ -2348,7 +2348,7 @@ void cut_mesh(const indexed_triangle_set& mesh, float z, indexed_triangle_set* u
     IntersectionLines  upper_lines, lower_lines;
     std::vector<int>   upper_slice_vertices, lower_slice_vertices;
     std::vector<Vec3i32> facets_edge_ids = its_face_edge_ids(mesh);
-    std::map<int, Vec3f> section_vertices_map;
+    std::map<int, Vec3f> section_vertices_map; // vertices on the cut plane
 
     for (int facet_idx = 0; facet_idx < int(mesh.indices.size()); ++ facet_idx) {
         const stl_triangle_vertex_indices &facet = mesh.indices[facet_idx];