diff --git a/Triangulation_3/include/CGAL/internal/spatial_sorting_traits_with_indices.h b/Triangulation_3/include/CGAL/internal/spatial_sorting_traits_with_indices.h
index b2da4a9f508..dd08b4f7c8c 100644
--- a/Triangulation_3/include/CGAL/internal/spatial_sorting_traits_with_indices.h
+++ b/Triangulation_3/include/CGAL/internal/spatial_sorting_traits_with_indices.h
@@ -69,6 +69,7 @@ template<class Base_traits,class PointPropertyMap>
 class Spatial_sort_traits_with_property_map_3:public Base_traits{
   PointPropertyMap accessor_;
 public:
+  Spatial_sort_traits_with_property_map_3(Base_traits base=Base_traits()):Base_traits(base){}
   Spatial_sort_traits_with_property_map_3(const PointPropertyMap& accessor,Base_traits base=Base_traits())
   :Base_traits(base),accessor_(accessor){}
 
@@ -112,6 +113,7 @@ template<class Base_traits,class PointPropertyMap>
 class Spatial_sort_traits_with_property_map_2:public Base_traits{
   PointPropertyMap accessor_;
 public:
+  Spatial_sort_traits_with_property_map_2(Base_traits base=Base_traits()):Base_traits(base){}  
   Spatial_sort_traits_with_property_map_2(const PointPropertyMap& accessor,Base_traits base=Base_traits())
   :Base_traits(base),accessor_(accessor){}