diff --git a/src/CGAL_Nef_polyhedron.cc b/src/CGAL_Nef_polyhedron.cc
index 046ed124..ba298adf 100644
--- a/src/CGAL_Nef_polyhedron.cc
+++ b/src/CGAL_Nef_polyhedron.cc
@@ -5,7 +5,6 @@
 #include "polyset.h"
 #include "dxfdata.h"
 #include "dxftess.h"
-#include <sstream>
 
 CGAL_Nef_polyhedron::CGAL_Nef_polyhedron(CGAL_Nef_polyhedron2 *p)
 {
diff --git a/src/CGAL_Nef_polyhedron_DxfData.cc b/src/CGAL_Nef_polyhedron_DxfData.cc
index 412314ae..411a3407 100644
--- a/src/CGAL_Nef_polyhedron_DxfData.cc
+++ b/src/CGAL_Nef_polyhedron_DxfData.cc
@@ -77,7 +77,7 @@ DxfData *CGAL_Nef_polyhedron::convertToDxfData() const
 	return dxfdata;
 }
 
-// moved here to reduce compile size/time of compiling CGAL_Nef_polyhedron.cc
+// dump the 2 dimensional nef_poly.
 std::string CGAL_Nef_polyhedron::dump_p2() const
 {
         std::stringstream out;