diff --git a/Optimal_transportation_reconstruction_2/include/CGAL/OTR_2/Cost.h b/Optimal_transportation_reconstruction_2/include/CGAL/OTR_2/Cost.h
index 6feec2eb217..658bb8ed801 100644
--- a/Optimal_transportation_reconstruction_2/include/CGAL/OTR_2/Cost.h
+++ b/Optimal_transportation_reconstruction_2/include/CGAL/OTR_2/Cost.h
@@ -48,7 +48,7 @@ public:
     m_total_weight(0)
   {}
 
-  Cost(const FT norm, const FT tang)
+  Cost(const FT norm = FT(0), const FT tang = FT(0))
   : m_norm(norm),
     m_tang(tang),
     m_max_norm(norm),
@@ -56,17 +56,6 @@ public:
     m_total_weight(0)
   {}
 
-  ~Cost() {}
-
-  Cost& operator= (const Cost& cost)
-  {
-    m_norm = cost.norm();
-    m_tang = cost.tang();
-    m_max_norm = cost.max_norm();
-    m_max_tang = cost.max_tang();
-    return *this;
-  }
-
   const FT norm() const { return m_norm; }
 
   const FT tang() const { return m_tang; }
diff --git a/Triangulation_2/include/CGAL/Constrained_triangulation_2.h b/Triangulation_2/include/CGAL/Constrained_triangulation_2.h
index cd79f2c2914..a453d120cd1 100644
--- a/Triangulation_2/include/CGAL/Constrained_triangulation_2.h
+++ b/Triangulation_2/include/CGAL/Constrained_triangulation_2.h
@@ -171,9 +171,6 @@ public:
 
   Constrained_triangulation_2(const Gt& gt = Gt()) : Triangulation(gt) { }
 
-  Constrained_triangulation_2(const Constrained_triangulation_2& ct)
-    : Triangulation(ct) {}
-
   Constrained_triangulation_2(std::list<Constraint>& lc, const Gt& gt=Gt())
       : Triangulation_2<Gt,Tds>(gt)
   {