diff --git a/Packages/Arrangement/test/Arrangement_2/test.C b/Packages/Arrangement/test/Arrangement_2/test.C
index c43619443f1..fdb25f399fd 100644
--- a/Packages/Arrangement/test/Arrangement_2/test.C
+++ b/Packages/Arrangement/test/Arrangement_2/test.C
@@ -63,7 +63,7 @@ int main(int argc, char* argv[])
 #elif CGAL_ARR_TEST_TRAITS == CGAL_POLYLINE_TRAITS
   #include <CGAL/Arr_polyline_traits.h>
 #elif CGAL_ARR_TEST_TRAITS == CGAL_POLYLINE_LEDA_TRAITS
-  //#error Currently not supported (July 2000)
+  #error Currently not supported (July 2000)
   #include <CGAL/leda_rational.h>
   #include <CGAL/Arr_leda_polyline_traits.h>
 #else
diff --git a/Packages/Arrangement/test/Arrangement_2/test_io.C b/Packages/Arrangement/test/Arrangement_2/test_io.C
index 688a46757e6..0673f1537ef 100755
--- a/Packages/Arrangement/test/Arrangement_2/test_io.C
+++ b/Packages/Arrangement/test/Arrangement_2/test_io.C
@@ -80,7 +80,7 @@ int main(int argc, char* argv[])
 #include <CGAL/Arr_polyline_traits.h>
 #include <CGAL/IO/Arr_polyline_traits_iostream.h>
 #elif CGAL_ARR_TEST_TRAITS==CGAL_POLYLINE_LEDA_TRAITS
-//#error Currently not supported (July 2000)
+#error Currently not supported (July 2000)
 #include <CGAL/leda_rational.h>
 #include <CGAL/Arr_leda_polyline_traits.h>
 #include <CGAL/IO/Arr_leda_polyline_traits_iostream.h>