diff --git a/Stream_support/include/CGAL/IO/GOCAD.h b/Stream_support/include/CGAL/IO/GOCAD.h
index c172a48f22d..98c1d20cc50 100644
--- a/Stream_support/include/CGAL/IO/GOCAD.h
+++ b/Stream_support/include/CGAL/IO/GOCAD.h
@@ -41,7 +41,7 @@ bool read_GOCAD(std::istream& is,
                 PointRange& points,
                 PolygonRange& polygons,
                 const CGAL_BGL_NP_CLASS&,
-                bool verbose = false)
+                bool verbose = true)
 {
   typedef typename boost::range_value<PointRange>::type     Point;
   typedef typename boost::range_value<PolygonRange>::type   Poly;
diff --git a/Stream_support/include/CGAL/IO/STL.h b/Stream_support/include/CGAL/IO/STL.h
index e528bc4fa3b..a41e04fd785 100644
--- a/Stream_support/include/CGAL/IO/STL.h
+++ b/Stream_support/include/CGAL/IO/STL.h
@@ -18,6 +18,7 @@
 #include <CGAL/IO/STL/STL_reader.h>
 
 #include <CGAL/boost/graph/Named_function_parameters.h>
+#include <CGAL/boost/graph/named_params_helper.h>
 #include <CGAL/Kernel/global_functions_3.h>
 
 #include <boost/range/value_type.hpp>
@@ -35,8 +36,8 @@ template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMP
 bool read_STL(std::istream& is,
               PointRange& points,
               TriangleRange& facets,
-              const CGAL_BGL_NP_CLASS& /*np*/,
-              bool verbose = true) // might become useful one day for face normals
+              const CGAL_BGL_NP_CLASS& /*np*/, // might become useful one day for face normals
+              bool verbose = false)
 {
   int pos = 0;
 
diff --git a/Stream_support/include/CGAL/IO/STL/STL_reader.h b/Stream_support/include/CGAL/IO/STL/STL_reader.h
index b8072e83ae9..96620ff053e 100644
--- a/Stream_support/include/CGAL/IO/STL/STL_reader.h
+++ b/Stream_support/include/CGAL/IO/STL/STL_reader.h
@@ -34,7 +34,7 @@ bool read_ASCII_facet(std::istream& is,
                       TriangleRange& facets,
                       int& index,
                       IndexMap& index_map,
-                      bool verbose = false)
+                      bool verbose = true)
 {
   typedef typename boost::range_value<PointRange>::type         Point;
   typedef typename boost::range_value<TriangleRange>::type      Triangle;
@@ -114,7 +114,7 @@ template <class PointRange, class TriangleRange>
 bool parse_ASCII_STL(std::istream& is,
                      PointRange& points,
                      TriangleRange& facets,
-                     bool verbose = false)
+                     bool verbose = true)
 {
   typedef typename boost::range_value<PointRange>::type           Point;
 
@@ -166,7 +166,7 @@ template <class PointRange, class TriangleRange>
 bool parse_binary_STL(std::istream& is,
                       PointRange& points,
                       TriangleRange& facets,
-                      bool verbose = false)
+                      bool verbose = true)
 {
   typedef typename boost::range_value<PointRange>::type         Point;
   typedef typename boost::range_value<TriangleRange>::type      Triangle;