diff --git a/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Hybrid_squared_distance_cost.h b/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Hybrid_squared_distance_cost.h
index f7395bcb6ff..dd6d16ef7ce 100644
--- a/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Hybrid_squared_distance_cost.h
+++ b/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Hybrid_squared_distance_cost.h
@@ -54,7 +54,6 @@ public:
     typedef typename PolylineConstraintTriangulation::Vertex_handle Vertex_handle;
     typedef typename PolylineConstraintTriangulation::Vertex_circulator Vertex_circulator;
     typedef typename PolylineConstraintTriangulation::Geom_traits Geom_traits ;
-    typedef typename Geom_traits::FT                                  FT;
     typedef typename Geom_traits::Compute_squared_distance_2 Compute_squared_distance;
     typedef typename Geom_traits::Construct_segment_2        Construct_segment;
     typedef typename Geom_traits::Segment_2                  Segment;