diff --git a/BGL/include/CGAL/boost/graph/generators.h b/BGL/include/CGAL/boost/graph/generators.h
index 0a4da951412..25de662748e 100644
--- a/BGL/include/CGAL/boost/graph/generators.h
+++ b/BGL/include/CGAL/boost/graph/generators.h
@@ -48,6 +48,12 @@ split_face(typename boost::graph_traits<Graph>::halfedge_descriptor h1,
 
 } // namespace Euler
 
+template <typename SourceMesh, typename TargetMesh,
+          typename NamedParameters1, typename NamedParameters2>
+void copy_face_graph(const SourceMesh& sm, TargetMesh& tm,
+                     const NamedParameters1& np1,
+                     const NamedParameters2& np2);
+
 namespace internal {
 
 template <class FaceGraph>