diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.cpp b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.cpp
index 78eccc625ad..c6b62a9a3d8 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.cpp
@@ -38,6 +38,10 @@ struct Volume_plane_intersection_priv
 };
 
 
+Volume_plane_intersection::~Volume_plane_intersection()
+{
+  delete d;
+}
 
 void Volume_plane_intersection_priv::computeElements()
 {
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.h b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.h
index ee7fb14ce23..0b22c305ee4 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.h
+++ b/Polyhedron/demo/Polyhedron/Plugins/Mesh_3/Volume_plane_intersection.h
@@ -19,6 +19,7 @@ class Volume_plane_intersection
 Q_OBJECT
 public:
   Volume_plane_intersection(float x, float y, float z);
+  ~Volume_plane_intersection();
 
   bool isFinite() const { return true; }
   bool isEmpty() const { return false; }