diff --git a/Mesh_2/doc/Mesh_2/CGAL/IO/write_VTU.h b/Mesh_2/doc/Mesh_2/CGAL/IO/write_VTU.h
index 6cc602fe620..2d8085723f1 100644
--- a/Mesh_2/doc/Mesh_2/CGAL/IO/write_VTU.h
+++ b/Mesh_2/doc/Mesh_2/CGAL/IO/write_VTU.h
@@ -33,6 +33,7 @@ void write_VTU(std::ostream& os,
 //!
 //! \param os the stream used for writing.
 //! \param tr the triangulated domain to be written.
+//! \param ipm the property map storing if a face is in the domain.
 //! \param mode decides if the data should be written in binary (`BINARY`)
 //!             or in \ascii (`ASCII`).
 //!
diff --git a/Mesh_2/include/CGAL/IO/write_VTU.h b/Mesh_2/include/CGAL/IO/write_VTU.h
index 21e55d3d690..6015437010d 100644
--- a/Mesh_2/include/CGAL/IO/write_VTU.h
+++ b/Mesh_2/include/CGAL/IO/write_VTU.h
@@ -405,7 +405,7 @@ void write_VTU(std::ostream& os,
                const CDT& tr,
                Mode mode = BINARY)
 {
-  internal::In_domain<CDT> in_domain;
+  CGAL::internal::In_domain<CDT> in_domain;
   write_VTU(os, tr, in_domain, mode);
 }