diff --git a/Triangulation_2/examples/Triangulation_2/draw_triangulation_2.cpp b/Triangulation_2/examples/Triangulation_2/draw_triangulation_2.cpp
index ec8f03b0e3b..24bcbb2e671 100644
--- a/Triangulation_2/examples/Triangulation_2/draw_triangulation_2.cpp
+++ b/Triangulation_2/examples/Triangulation_2/draw_triangulation_2.cpp
@@ -7,8 +7,8 @@ typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
 typedef CGAL::Triangulation_2<K>                            Triangulation;
 typedef Triangulation::Point                                Point;
 
-int main() {
-  std::ifstream in("data/triangulation_prog1.cin");
+int main(int argc, char* argv[]) {
+  std::ifstream in((argc>1)?argv[1]:"data/triangulation_prog1.cin");
   std::istream_iterator<Point> begin(in);
   std::istream_iterator<Point> end;