diff --git a/Partition_2/include/CGAL/Partition_2/Triangulation_indirect_traits_2.h b/Partition_2/include/CGAL/Partition_2/Triangulation_indirect_traits_2.h
index 3015fcb1ff9..3693d97c7b0 100644
--- a/Partition_2/include/CGAL/Partition_2/Triangulation_indirect_traits_2.h
+++ b/Partition_2/include/CGAL/Partition_2/Triangulation_indirect_traits_2.h
@@ -122,6 +122,7 @@ template <class Circulator>
 class Construct_circulator_2
 {
 public:
+   typedef Circulator result_type;
    Circulator operator()(Circulator p1) const { return p1; }
 };