diff --git a/STL_Extension/include/CGAL/Named_function_parameters.h b/STL_Extension/include/CGAL/Named_function_parameters.h
index 2d5a83bc92c..75db8c5ca11 100644
--- a/STL_Extension/include/CGAL/Named_function_parameters.h
+++ b/STL_Extension/include/CGAL/Named_function_parameters.h
@@ -20,6 +20,7 @@
 
 #include <boost/type_traits/is_same.hpp>
 #include <boost/mpl/if.hpp>
+#include <boost/mpl/has_xxx.hpp>
 
 #include <type_traits>
 #include <utility>
@@ -311,6 +312,9 @@ struct Named_function_parameters
   {
     return Named_function_parameters<OT, OTag, self>(np.v,*this).combine(nps...);
   }
+
+  // typedef for SFINAE
+  typedef int CGAL_Named_function_parameters_class;
 };
 
 namespace parameters {
@@ -522,4 +526,9 @@ namespace boost
 }
 #endif
 
+// For disambiguation using SFINAR
+BOOST_MPL_HAS_XXX_TRAIT_DEF(CGAL_Named_function_parameters_class)
+template<class T>
+CGAL_CPP17_INLINE constexpr bool is_named_function_parameter = has_CGAL_Named_function_parameters_class<T>::value;
+
 #endif // CGAL_BOOST_FUNCTION_PARAMS_HPP