diff --git a/Packages/Arrangement/examples/Sweep_line/example1.C b/Packages/Arrangement/examples/Sweep_line/example1.C
index e005ec0b0cf..81e61fcbb37 100644
--- a/Packages/Arrangement/examples/Sweep_line/example1.C
+++ b/Packages/Arrangement/examples/Sweep_line/example1.C
@@ -12,7 +12,7 @@
 
 #include <CGAL/IO/Pm_iostream.h>
 
-#include <iostream.h>
+#include <iostream>
 #include <vector>
 
 //uncomment if you have LEDA installed.
diff --git a/Packages/Arrangement/examples/Sweep_line/example2.C b/Packages/Arrangement/examples/Sweep_line/example2.C
index 9f3e595923d..7287fc4fd5b 100644
--- a/Packages/Arrangement/examples/Sweep_line/example2.C
+++ b/Packages/Arrangement/examples/Sweep_line/example2.C
@@ -12,7 +12,7 @@
 
 #include <CGAL/IO/Pm_iostream.h>
 
-#include <iostream.h>
+#include <iostream>
 #include <vector>
 
 //uncomment if you have LEDA installed.
diff --git a/Packages/Arrangement/examples/Sweep_line/example3.C b/Packages/Arrangement/examples/Sweep_line/example3.C
index 03ba6656225..946e11dc249 100644
--- a/Packages/Arrangement/examples/Sweep_line/example3.C
+++ b/Packages/Arrangement/examples/Sweep_line/example3.C
@@ -6,7 +6,7 @@
 #include <CGAL/Arr_segment_exact_traits.h>
 #include <CGAL/sweep_to_produce_planar_map_subcurves.h>
 
-#include <iostream.h>
+#include <iostream>
 #include <vector>
 
 typedef CGAL::Quotient<int>              NT;
diff --git a/Packages/Arrangement/examples/Sweep_line/example4.C b/Packages/Arrangement/examples/Sweep_line/example4.C
index 11cd48a865f..b871fa0ab6b 100644
--- a/Packages/Arrangement/examples/Sweep_line/example4.C
+++ b/Packages/Arrangement/examples/Sweep_line/example4.C
@@ -11,7 +11,7 @@
 #include <CGAL/Arr_polyline_traits.h>
 //#include <CGAL/IO/Arr_polyline_traits_iostream.h>
 
-#include <iostream.h>
+#include <iostream>
 #include <vector>
 
 typedef CGAL::Quotient<int>                  NT;