diff --git a/TDS_3/include/CGAL/Triangulation_simplex_3.h b/TDS_3/include/CGAL/Triangulation_simplex_3.h
index c6245e8bb9f..252869bf523 100644
--- a/TDS_3/include/CGAL/Triangulation_simplex_3.h
+++ b/TDS_3/include/CGAL/Triangulation_simplex_3.h
@@ -294,6 +294,10 @@ struct Output_rep<Triangulation_simplex_3<TriangulationDataStructure_3>, Tag >
   Simplex simplex;
   Tag tag;
 
+  Output_rep(Simplex s)
+    : simplex(s)
+  {}
+
   std::ostream& operator()(std::ostream& os) const {
     auto display_vert = [&](auto v) {
       return CGAL::IO::oformat(v, tag);