diff --git a/Box_intersection_d/include/CGAL/Box_intersection_d/Box_traits_d.h b/Box_intersection_d/include/CGAL/Box_intersection_d/Box_traits_d.h
index 37cf09e65fe..af3fbaf061b 100644
--- a/Box_intersection_d/include/CGAL/Box_intersection_d/Box_traits_d.h
+++ b/Box_intersection_d/include/CGAL/Box_intersection_d/Box_traits_d.h
@@ -42,7 +42,7 @@ struct Box_traits_d {
     static NT  min_coord(Box_parameter b, int dim) { return b.min_coord( dim);}
     static NT  max_coord(Box_parameter b, int dim) { return b.max_coord( dim);}
     static ID  id(Box_parameter b)                 { return b.id();}
-    static int dimension()                    { return BoxHandle::dimension();}
+    static int dimension()                         { return BoxHandle::dimension();}
 };
 
 // box pointer traits