diff --git a/Minkowski_sum_3/examples/Minkowski_sum_3/cube_offset.cpp b/Minkowski_sum_3/examples/Minkowski_sum_3/cube_offset.cpp
index e1037defc9d..0df5e2102c8 100644
--- a/Minkowski_sum_3/examples/Minkowski_sum_3/cube_offset.cpp
+++ b/Minkowski_sum_3/examples/Minkowski_sum_3/cube_offset.cpp
@@ -1,7 +1,5 @@
 #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
-#include <CGAL/Polyhedron_3.h>
 #include <CGAL/Nef_polyhedron_3.h>
-#include <CGAL/IO/Polyhedron_iostream.h>
 #include <CGAL/IO/Nef_polyhedron_iostream_3.h>
 #include <CGAL/minkowski_sum_3.h>
 #include <fstream>
@@ -9,7 +7,6 @@
 
 typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
 typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;
-typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
 
 int main() {