1 files changed, 4 insertions, 4 deletions
diff --git a/src/Coxeter_triangulation/include/gudhi/Functions/Negation.h b/src/Coxeter_triangulation/include/gudhi/Functions/Negation.h
index 6b7feff5..e28d9ddb 100644
--- a/src/Coxeter_triangulation/include/gudhi/Functions/Negation.h
+++ b/src/Coxeter_triangulation/include/gudhi/Functions/Negation.h
@@ -39,19 +39,19 @@ struct Negation : public Function {
    * \brief Value of the function at a specified point.
    * @param[in] p The input point. The dimension needs to coincide with the ambient dimension.
    */
-  Eigen::VectorXd operator()(const Eigen::VectorXd& p) const {
+  virtual Eigen::VectorXd operator()(const Eigen::VectorXd& p) const override {
     Eigen::VectorXd result = -fun_(p);
     return result;
   }
 
   /** \brief Returns the domain (ambient) dimension. */
-  std::size_t amb_d() const {return fun_.amb_d();}
+  virtual std::size_t amb_d() const override {return fun_.amb_d();}
 
   /** \brief Returns the codomain dimension. */
-  std::size_t cod_d() const {return fun_.cod_d();}
+  virtual std::size_t cod_d() const override {return fun_.cod_d();}
 
   /** \brief Returns a point on the zero-set. */
-  Eigen::VectorXd seed() const {
+  virtual Eigen::VectorXd seed() const override {
     Eigen::VectorXd result = fun_.seed();
     return result;
   }