diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin.cpp
index 237c96f626a..fd013b1349d 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin.cpp
@@ -811,7 +811,7 @@ void Mesh_3_plugin::mesh_3(const Mesh_type mesh_type,
       image_item->set_image_weights(weights, sigma_weights);
     }
 #endif
-    const Image* pWeights = sigma_weights > 0
+    Image* const pWeights = sigma_weights > 0
       ? image_item->image_weights()
       : nullptr;
 
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.cpp b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.cpp
index f450ea85197..ad7594d0ea2 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.cpp
@@ -302,7 +302,7 @@ Meshing_thread* cgal_code_mesh_3(const Image* pImage,
                                  float iso_value,
                                  float value_outside,
                                  bool inside_is_less,
-                                 const Image* pWeights)
+                                 Image* const pWeights)
 {
   if (nullptr == pImage) { return nullptr; }
 
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.h b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.h
index 03e9514ba65..90994613d93 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.h
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Mesh_3_plugin_cgal_code.h
@@ -81,5 +81,5 @@ Meshing_thread* cgal_code_mesh_3(const CGAL::Image_3* pImage,
                                  float iso_value = 3.f,
                                  float value_outside = 0.f,
                                  bool inside_is_less = true,
-                                 const CGAL::Image_3* pWeights = nullptr);
+                                 CGAL::Image_3* const pWeights);
 #endif
diff --git a/Polyhedron/demo/Polyhedron/Scene_image_item.cpp b/Polyhedron/demo/Polyhedron/Scene_image_item.cpp
index 229aff8a7ff..c03260e4445 100644
--- a/Polyhedron/demo/Polyhedron/Scene_image_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_image_item.cpp
@@ -500,7 +500,7 @@ Scene_image_item::compute_bbox() const
                 m_image->image()->tz+(m_image->zdim()-1) * m_image->vz()));
 }
 
-const Image*
+Image* const
 Scene_image_item::image_weights() const
 {
   return &d->m_image_weights;
diff --git a/Polyhedron/demo/Polyhedron/Scene_image_item.h b/Polyhedron/demo/Polyhedron/Scene_image_item.h
index f1470860c0b..9302eaa3c7c 100644
--- a/Polyhedron/demo/Polyhedron/Scene_image_item.h
+++ b/Polyhedron/demo/Polyhedron/Scene_image_item.h
@@ -45,7 +45,7 @@ public:
   bool isGray();
   Image* m_image;
 
-  const Image* image_weights() const;
+  Image* const image_weights() const;
   void set_image_weights(const Image& img, const float sigma);
   float sigma_weights() const;