diff --git a/Triangulation_3/include/CGAL/Triangulation_3.h b/Triangulation_3/include/CGAL/Triangulation_3.h
index 21e888f8eaf..f9db56a0e9b 100644
--- a/Triangulation_3/include/CGAL/Triangulation_3.h
+++ b/Triangulation_3/include/CGAL/Triangulation_3.h
@@ -51,6 +51,7 @@
 #include <CGAL/Iterator_project.h>
 #include <CGAL/Default.h>
 
+#include <CGAL/Bbox_3.h>
 #include <CGAL/Spatial_lock_grid_3.h>
 
 #include <boost/bind.hpp>