diff --git a/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Cylinder.h b/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Cylinder.h
index 9a4484c1737..b95aa6e4228 100644
--- a/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Cylinder.h
+++ b/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Cylinder.h
@@ -141,7 +141,7 @@ namespace CGAL {
       m_point_on_axis = this->transl(p1, this->scale(xDir, m_radius));
       m_radius = CGAL::abs(m_radius);
 
-      m_axis = m_traits.construct_line_3_object()(m_point_on_axis, axis);
+      m_axis = this->m_traits.construct_line_3_object()(m_point_on_axis, axis);
 
       if (squared_distance(p1) > this->m_epsilon ||
           (cos_to_normal(p1, n1) < this->m_normal_threshold))
diff --git a/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Efficient_RANSAC_fake_traits_for_testing.h b/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Efficient_RANSAC_fake_traits_for_testing.h
index 919c0a4361f..0b335c9589f 100644
--- a/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Efficient_RANSAC_fake_traits_for_testing.h
+++ b/Point_set_shape_detection_3/include/CGAL/Shape_detection_3/Efficient_RANSAC_fake_traits_for_testing.h
@@ -93,28 +93,27 @@ namespace CGAL {
         self& operator--() { return *this; }
         self  operator--(int) { return *this; }
 
-        self& operator+=(difference_type i) { return *this; }
-        self& operator-=(difference_type i) { return *this; }
-        self operator+(difference_type i) const { return *this; }
-        self operator-(difference_type i) const { return *this; }
+        self& operator+=(difference_type) { return *this; }
+        self& operator-=(difference_type) { return *this; }
+        self operator+(difference_type) const { return *this; }
+        self operator-(difference_type) const { return *this; }
 
-        difference_type operator-(self x) const { return 0; }
+        difference_type operator-(self ) const { return 0; }
 
         value_type operator*() const { return value_type(); }
-        value_type operator[](difference_type i) const { return value_type(); }
+        value_type operator[](difference_type ) const { return value_type(); }
 
-        bool operator==(const self& x) const { return true; }
-        bool operator!=(const self& x) const { return true; }
-        bool operator<(const self& x) const  { return true; }
+        bool operator==(const self& ) const { return true; }
+        bool operator!=(const self& ) const { return true; }
+        bool operator<(const self& ) const  { return true; }
       };
 
       struct Construct_cartesian_const_iterator_d{
-        typedef typename Point_3 Point_d;
-        typedef typename Cartesian_const_iterator_d  Cartesian_const_iterator_d;
+        typedef Point_3 Point_d;
         typedef Cartesian_const_iterator_d result_type;
 
-        Cartesian_const_iterator_d operator()(Point_d const& p) const { return Cartesian_const_iterator_d(); }
-        Cartesian_const_iterator_d operator()(Point_d const& p, int) const { return Cartesian_const_iterator_d(); }
+        Cartesian_const_iterator_d operator()(Point_d const& ) const { return Cartesian_const_iterator_d(); }
+        Cartesian_const_iterator_d operator()(Point_d const& , int) const { return Cartesian_const_iterator_d(); }
       };
       struct Iso_box_d{};
       struct Sphere_d{};