diff --git a/Packages/Number_types/include/CGAL/number_type_basic.h b/Packages/Number_types/include/CGAL/number_type_basic.h
index 096df6a4a80..7c81708f861 100644
--- a/Packages/Number_types/include/CGAL/number_type_basic.h
+++ b/Packages/Number_types/include/CGAL/number_type_basic.h
@@ -55,6 +55,13 @@ NT
 min(const NT& x, const NT& y)
 { return (y < x) ? y : x; }
 
+template <class NT, class Comp>
+inline
+NT
+// const NT&
+min(const NT& x, const NT& y, const Comp& c)
+{ return c(x, y) ? x : y; }
+
 template <class NT>
 inline
 NT
@@ -62,6 +69,13 @@ NT
 max(const NT& x, const NT& y)
 { return (x < y) ? y : x; }
 
+template <class NT, class Comp>
+inline
+NT
+// const NT&
+max(const NT& x, const NT& y, const Comp& c)
+{ return c(x, y) ? y : x; }
+
 #endif
 
 CGAL_END_NAMESPACE