diff --git a/BGL/include/CGAL/boost/graph/IO/OM.h b/BGL/include/CGAL/boost/graph/IO/OM.h
index aae313b34421..5f982ffde489 100644
--- a/BGL/include/CGAL/boost/graph/IO/OM.h
+++ b/BGL/include/CGAL/boost/graph/IO/OM.h
@@ -214,7 +214,7 @@ bool read_OM(const std::string& fname,
 */
 template <typename Graph, typename CGAL_NP_TEMPLATE_PARAMETERS>
 bool write_OM(const std::string& fname,
-              Graph& g,
+              const Graph& g,
               const CGAL_NP_CLASS& np = parameters::default_values())
 {
   using vertex_descriptor = typename boost::graph_traits<Graph>::vertex_descriptor;
diff --git a/Stream_support/doc/Stream_support/IOstream.txt b/Stream_support/doc/Stream_support/IOstream.txt
index fb4d9fe8afae..f75adf3e2a9e 100644
--- a/Stream_support/doc/Stream_support/IOstream.txt
+++ b/Stream_support/doc/Stream_support/IOstream.txt
@@ -421,6 +421,7 @@ The table above only lists the functions that work with any polygon mesh.
       <th colspan="1">\ref IOStreamOBJ "OBJ"</th>
       <th colspan="1">\ref IOStreamGocad "GOCAD"</th>
       <th colspan="1">\ref IOStreamWRL "WRL"</th>
+      <th colspan="1">\ref IOStreamOM "OpenMesh (OM)"</th>
     </tr>
     <tr>
       <td>Input</td>
@@ -430,6 +431,7 @@ The table above only lists the functions that work with any polygon mesh.
       <td>`CGAL::IO::read_VTP()`</td>
       <td>`CGAL::IO::read_OBJ()`</td>
       <td>`CGAL::IO::read_GOCAD()`</td>
+      <td>`CGAL::IO::read_OM()`</td>
       <td><center> - </center></td>
     </tr>
     <tr>
@@ -441,6 +443,7 @@ The table above only lists the functions that work with any polygon mesh.
       <td>`CGAL::IO::write_OBJ()`</td>
       <td>`CGAL::IO::write_GOCAD()`</td>
       <td>`CGAL::IO::write_WRL()`</td>
+      <td>`CGAL::IO::write_OM()`</td>
     </tr>
 </table>