diff --git a/Stream_support/include/CGAL/IO/OI/Inventor_ostream.h b/Stream_support/include/CGAL/IO/OI/Inventor_ostream.h
index 42d2cd78182..20f4f5d25c0 100644
--- a/Stream_support/include/CGAL/IO/OI/Inventor_ostream.h
+++ b/Stream_support/include/CGAL/IO/OI/Inventor_ostream.h
@@ -89,6 +89,18 @@ private:
   }
 };
 
+template<typename NP>
+void set_default_stream_precision(Inventor_ostream_base& os, const NP& np)
+{
+  if(!parameters::is_default_parameter(
+       parameters::get_parameter(np, internal_np::stream_precision)))
+  {
+    const int precision = parameters::choose_parameter<int>(
+          parameters::get_parameter(np, internal_np::stream_precision));
+    os.os().precision(precision);
+  }
+}
+
 } // namespace CGAL
 
 #endif // CGAL_IO_INVENTOR_OSTREAM_H
diff --git a/Stream_support/include/CGAL/IO/VRML/VRML_2_ostream.h b/Stream_support/include/CGAL/IO/VRML/VRML_2_ostream.h
index 1de37df3967..cb8ef7ecc47 100644
--- a/Stream_support/include/CGAL/IO/VRML/VRML_2_ostream.h
+++ b/Stream_support/include/CGAL/IO/VRML/VRML_2_ostream.h
@@ -104,6 +104,17 @@ inline VRML_2_ostream& operator<<(VRML_2_ostream& os,
   return os;
 }
 
+template<typename NP>
+void set_default_stream_precision(VRML_2_ostream& os, const NP& np)
+{
+  if(!parameters::is_default_parameter(
+       parameters::get_parameter(np, internal_np::stream_precision)))
+  {
+    const int precision = parameters::choose_parameter<int>(
+          parameters::get_parameter(np, internal_np::stream_precision));
+    os.os().precision(precision);
+  }
+}
 } // namespace CGAL
 
 #endif // CGAL_IO_VRML_2_OSTREAM_H
@@ -315,4 +326,5 @@ operator<<(VRML_2_ostream& os,
 } //namespace CGAL
 
 #endif // CGAL_IO_VRML_VRML_2_SEGMENT_3
+
 #endif // CGAL_SPHERE_3_H