diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orientation.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orientation.h
index 676b4ab4359..b581b7fe2d1 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orientation.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/orientation.h
@@ -26,6 +26,7 @@
 
 
 #include <algorithm>
+#include <CGAL/Polygon_mesh_processing/compute_normal.h>
 #include <CGAL/Polygon_mesh_processing/internal/named_function_params.h>
 #include <CGAL/Polygon_mesh_processing/internal/named_params_helper.h>
 #include <CGAL/boost/graph/helpers.h>
@@ -65,8 +66,8 @@ namespace internal{
                            const PM& pmesh,
                            const NamedParameters& np)
   {
-    const typename Kernel::Vector_3&
-      normal_v_min = compute_vertex_normal(vd, pmesh, np);
+    const typename Kernel::Vector_3& normal_v_min
+      = CGAL::Polygon_mesh_processing::compute_vertex_normal(vd, pmesh, np);
 
     return normal_v_min[0] < 0 || (
               normal_v_min[0] == 0 && (