diff --git a/Packages/Triangulation_3/changes.txt b/Packages/Triangulation_3/changes.txt
index 71a8ea2ff83..a6f2c719fb3 100644
--- a/Packages/Triangulation_3/changes.txt
+++ b/Packages/Triangulation_3/changes.txt
@@ -1,3 +1,6 @@
+Version 1.57 (5  June 01)
+- Add missing typename for MipsPro.
+
 Version 1.56 (1  June 01)
 - Document the hierarchy.
 - Use MP_Float.
diff --git a/Packages/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h b/Packages/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
index 4d2d4d8281f..19943bed27d 100644
--- a/Packages/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
+++ b/Packages/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
@@ -2555,7 +2555,8 @@ swap(Tds & tds)
 }
 
 template <class Vb, class Cb >
-std::vector< Triangulation_data_structure_3<Vb,Cb>::Vertex * > 
+std::vector< CGAL_TYPENAME_MSVC_NULL
+             Triangulation_data_structure_3<Vb,Cb>::Vertex * > 
 Triangulation_data_structure_3<Vb,Cb>::
 clear_cells_only()
 {