diff --git a/Cartesian_kernel/include/CGAL/Cartesian_converter.h b/Cartesian_kernel/include/CGAL/Cartesian_converter.h
index 576c6e78599..946dc51ce4b 100644
--- a/Cartesian_kernel/include/CGAL/Cartesian_converter.h
+++ b/Cartesian_kernel/include/CGAL/Cartesian_converter.h
@@ -134,15 +134,6 @@ public:
         return t;
     }
 
-    template <typename T>
-    T
-    operator()(const T t,
-               typename std::enable_if<!std::is_fundamental<T>::value>::type* = nullptr) const
-    {
-        CGAL_static_assertion(!(std::is_same<T, T>::value));
-        return t;
-    }
-
     // drop the boost::detail::variant::void_ generated by the macros
     // from the sequence, transform with the type mapper and throw the
     // new list into a variant
diff --git a/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h b/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
index cb22a9548b9..22edf4e3e18 100644
--- a/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
+++ b/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
@@ -94,15 +94,6 @@ public:
         return t;
     }
 
-    template <typename T>
-    T
-    operator()(const T t,
-               typename std::enable_if<!std::is_fundamental<T>::value>::type* = nullptr) const
-    {
-        CGAL_static_assertion(!(std::is_same<T, T>::value));
-        return t;
-    }
-
     typename K2::Point_2
     operator()(const typename K1::Point_2 &a) const
     {
diff --git a/Kernel_d/include/CGAL/Kernel_d/Cartesian_converter_d.h b/Kernel_d/include/CGAL/Kernel_d/Cartesian_converter_d.h
index c207c83dee7..e38fea77163 100644
--- a/Kernel_d/include/CGAL/Kernel_d/Cartesian_converter_d.h
+++ b/Kernel_d/include/CGAL/Kernel_d/Cartesian_converter_d.h
@@ -107,15 +107,6 @@ public:
         return t;
     }
 
-    template <typename T>
-    T
-    operator()(const T t,
-               typename std::enable_if<!std::is_fundamental<T>::value>::type* = nullptr) const
-    {
-        CGAL_static_assertion(!(std::is_same<T, T>::value));
-        return t;
-    }
-
     std::vector<Object>
     operator()(const std::vector<Object>& v) const
     {