diff --git a/Stream_support/include/CGAL/IO/OM.h b/Stream_support/include/CGAL/IO/OM.h
index 2976c97c086..ba648f9ab0c 100644
--- a/Stream_support/include/CGAL/IO/OM.h
+++ b/Stream_support/include/CGAL/IO/OM.h
@@ -16,6 +16,7 @@
 #include <OpenMesh/Core/IO/MeshIO.hh>
 #include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
 
+#include <CGAL/boost/graph/copy_face_graph.h>
 #include <CGAL/boost/graph/graph_traits_PolyMesh_ArrayKernelT.h>
 #include <CGAL/boost/graph/iterator.h>
 #include <CGAL/property_map.h>