diff --git a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3.h b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3.h
index 7e07efe5382..7b7dd93be68 100644
--- a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3.h
+++ b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_3.h
@@ -2424,8 +2424,9 @@ std::vector<Vertex_handle>();
   }
   return vir_vertices[0][0][0];
 }
-
+#define CGAL_INCLUDE_FROM_PERIODIC_3_TRIANGULATION_3_H
 #include <CGAL/Periodic_3_triangulation_dummy_36.h>
+#undef CGAL_INCLUDE_FROM_PERIODIC_3_TRIANGULATION_3_H
 
 /** finds all cells that are in conflict with the currently added point
   * (stored in tester).
diff --git a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_dummy_36.h b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_dummy_36.h
index 2179f1754b5..c1fbf9c565d 100644
--- a/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_dummy_36.h
+++ b/Periodic_3_triangulation_3/include/CGAL/Periodic_3_triangulation_dummy_36.h
@@ -18,8 +18,8 @@
 //
 // Author(s)     : Manuel Caroli <Manuel.Caroli@sophia.inria.fr>
 
-#ifndef CGAL_PERIODIC_3_TRIANGULATION_DUMMY_36_H
-#define CGAL_PERIODIC_3_TRIANGULATION_DUMMY_36_H
+#ifdef CGAL_INCLUDE_FROM_PERIODIC_3_TRIANGULATION_3_H 
+
 
 template < class GT, class TDS >
 inline std::vector<typename Periodic_3_triangulation_3<GT,TDS>::Vertex_handle >
@@ -754,4 +754,4 @@ Periodic_3_triangulation_3<GT,TDS>::insert_dummy_points() {
   return ret_vector;
 }
 
-#endif // CGAL_PERIODIC_3_TRIANGULATION_DUMMY_36_H
+#endif // CGAL_INCLUDE_FROM_PERIODIC_3_TRIANGULATION_3_H