diff --git a/Polytope_distance_d/examples/Polytope_distance_d/width_simplex.cpp b/Polytope_distance_d/examples/Polytope_distance_d/width_simplex.cpp
index 27ea1796b58..b909f263d9c 100644
--- a/Polytope_distance_d/examples/Polytope_distance_d/width_simplex.cpp
+++ b/Polytope_distance_d/examples/Polytope_distance_d/width_simplex.cpp
@@ -40,6 +40,7 @@ int main() {
     std::cout << "Direction: " << simplex.get_build_direction() << std::endl;
 
     Plane_3  e1, e2;
+    simplex.get_width_planes (e1, e2);
     std::cout << "Planes: E1: " << e1 << ".  E2: " << e2 <<std::endl;
 
     std::cout << "Number of optimal solutions: "