diff --git a/BGL/include/CGAL/boost/graph/IO/PLY.h b/BGL/include/CGAL/boost/graph/IO/PLY.h
index 6b5f5237801..c069ef7e96e 100644
--- a/BGL/include/CGAL/boost/graph/IO/PLY.h
+++ b/BGL/include/CGAL/boost/graph/IO/PLY.h
@@ -174,7 +174,7 @@ bool read_PLY(std::istream& is,
 
   \param fname the name of the input file
   \param g the graph to be built from the input data
-  \param comments a string included line by line in the header of the PLY stream (each line will be precedeed by "comment
+  \param comments a string included line by line in the header of the PLY stream (each line will be precedeed by "comment" )
   \param np optional \ref bgl_namedparameters "Named Parameters" described below
 
   \cgalNamedParamsBegin
diff --git a/Surface_mesh/include/CGAL/Surface_mesh/IO/PLY.h b/Surface_mesh/include/CGAL/Surface_mesh/IO/PLY.h
index b27e5ebefa1..24808879542 100644
--- a/Surface_mesh/include/CGAL/Surface_mesh/IO/PLY.h
+++ b/Surface_mesh/include/CGAL/Surface_mesh/IO/PLY.h
@@ -821,8 +821,11 @@ void fill_header(std::ostream& os, const Surface_mesh<Point>& sm,
 template <typename P, typename CGAL_NP_TEMPLATE_PARAMETERS>
 bool read_PLY(std::istream& is,
               Surface_mesh<P>& sm,
-              std::string& comments,
-              const CGAL_NP_CLASS& np = parameters::default_values())
+              std::string& comments
+#ifndef DOXYGEN_RUNNING
+              , const CGAL_NP_CLASS& np = parameters::default_values()
+#endif
+              )
 {
   typedef typename Surface_mesh<P>::size_type size_type;