diff --git a/Polyhedron/demo/Polyhedron/Plugins/PCA/Affine_transform_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/PCA/Affine_transform_plugin.cpp
index 75b996dda51..49cb1b2f15f 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/PCA/Affine_transform_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/PCA/Affine_transform_plugin.cpp
@@ -417,12 +417,9 @@ void Polyhedron_demo_affine_transform_plugin::grid()
       Scene_item::Bbox b = item->bbox();
 
 
-      double x_t(CGAL::sqrt(CGAL::squared_distance(Kernel::Point_3((b.min)(0), (b.min)(1), (b.min)(2)),
-                                                   Kernel::Point_3((b.max)(0), (b.min)(1), (b.min)(2))))),
-          y_t(CGAL::sqrt(CGAL::squared_distance(Kernel::Point_3((b.min)(0), (b.min)(1), (b.min)(2)),
-                                                Kernel::Point_3((b.min)(0), (b.max)(1), (b.min)(2))))),
-          z_t(CGAL::sqrt(CGAL::squared_distance(Kernel::Point_3((b.min)(0), (b.min)(1), (b.min)(2)),
-                                                Kernel::Point_3((b.min)(0), (b.min)(1), (b.max)(2)))));
+      double x_t(1.001*((b.max)(0)- (b.min)(0))),
+          y_t(1.001*((b.max)(1)- (b.min)(1))),
+          z_t(1.001*((b.max)(2)- (b.min)(2)));
 
       GridDialog dialog(mw);
       dialog.x_space_doubleSpinBox->setValue(x_t);