diff --git a/Arrangement_on_surface_2/include/CGAL/Arr_point_location/Trapezoidal_decomposition_2_misc.h b/Arrangement_on_surface_2/include/CGAL/Arr_point_location/Trapezoidal_decomposition_2_misc.h
index dc4a80af7ad..76a6a5fe323 100644
--- a/Arrangement_on_surface_2/include/CGAL/Arr_point_location/Trapezoidal_decomposition_2_misc.h
+++ b/Arrangement_on_surface_2/include/CGAL/Arr_point_location/Trapezoidal_decomposition_2_misc.h
@@ -27,7 +27,6 @@
 #include <CGAL/Arr_point_location/Td_dag_node.h>
 #endif
 
-#if 0
 //#define CGAL_TD_DELETE_SIGNATURE 0xffffffff
 //
 ////type
@@ -40,14 +39,13 @@
 //#define CGAL_TD_ON_RIGHT_BOUNDARY    0x8
 //#define CGAL_TD_ON_BOTTOM_BOUNDARY   0x10
 //#define CGAL_TD_ON_TOP_BOUNDARY      0x20
-//#define CGAL_TD_ON_ALL_BOUNDARIES \
-//   (CGAL_TD_ON_LEFT_BOUNDARY | CGAL_TD_ON_RIGHT_BOUNDARY | \
+//#define CGAL_TD_ON_ALL_BOUNDARIES 
+//  (CGAL_TD_ON_LEFT_BOUNDARY | CGAL_TD_ON_RIGHT_BOUNDARY | 
 //   CGAL_TD_ON_BOTTOM_BOUNDARY| CGAL_TD_ON_TOP_BOUNDARY)
 //#define CGAL_TD_INTERIOR             0
 //
 //#define CGAL_TD_CV_MIN_END           0
 //#define CGAL_TD_CV_MAX_END           0x1 
-#endif
 
 #define CGAL_TD_DEFAULT_DEPTH_THRESHOLD 60
 #define CGAL_TD_DEFAULT_SIZE_THRESHOLD 12