diff --git a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Kernel_wrapper_2.h b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Kernel_wrapper_2.h
index cbfc497a064..fc585ea6f40 100644
--- a/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Kernel_wrapper_2.h
+++ b/Apollonius_graph_2/include/CGAL/Apollonius_graph_2/Kernel_wrapper_2.h
@@ -52,8 +52,7 @@ private:
 
 
 public:
-#if defined(_MSC_VER) || defined(__sgi) \
-    || defined(CGAL_CFG_USING_BASE_MEMBER_BUG)
+#if defined(_MSC_VER) || defined(__sgi)
   bool operator()(bool b) const {
     return Base::operator()(b);
   }
diff --git a/Cartesian_kernel/include/CGAL/Cartesian_converter.h b/Cartesian_kernel/include/CGAL/Cartesian_converter.h
index a45d8f38706..b925daa68e2 100644
--- a/Cartesian_kernel/include/CGAL/Cartesian_converter.h
+++ b/Cartesian_kernel/include/CGAL/Cartesian_converter.h
@@ -62,26 +62,7 @@ public:
     typedef K2         Target_kernel;
     typedef Converter  Number_type_converter;
 
-#ifdef CGAL_CFG_USING_BASE_MEMBER_BUG
-    bool operator()(bool b) const { return Base::operator()(b); }
-    Sign operator()(Sign s) const { return Base::operator()(s); }
-
-    Oriented_side operator()(Oriented_side os) const {
-      return Base::operator()(os);
-    }
-
-    Bounded_side operator()(Bounded_side bs) const {
-      return Base::operator()(bs);
-    }
-
-    Comparison_result operator()(Comparison_result cr) const {
-      return Base::operator()(cr);
-    }
-
-    Angle operator()(Angle a) const { return Base::operator()(a); }
-#else
     using Base::operator();
-#endif
 
     Cartesian_converter() // To shut up a warning with SunPRO.
 	: c(), k() {}
diff --git a/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h b/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
index e2daf4f18f6..876f51629c6 100644
--- a/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
+++ b/Homogeneous_kernel/include/CGAL/Homogeneous_converter.h
@@ -52,26 +52,7 @@ public:
     typedef RT_Converter  Ring_number_type_converter;
     typedef FT_Converter  Field_number_type_converter;
 
-#ifdef CGAL_CFG_USING_BASE_MEMBER_BUG
-    bool operator()(bool b) const { return Base::operator()(b); }
-    Sign operator()(Sign s) const { return Base::operator()(s); }
-
-    Oriented_side operator()(Oriented_side os) const {
-      return Base::operator()(os);
-    }
-
-    Bounded_side operator()(Bounded_side bs) const {
-      return Base::operator()(bs);
-    }
-
-    Comparison_result operator()(Comparison_result cr) const {
-      return Base::operator()(cr);
-    }
-
-    Angle operator()(Angle a) const { return Base::operator()(a); }
-#else
     using Base::operator();
-#endif
 
     Bbox_2
     operator()(const Bbox_2& b)
diff --git a/Installation/config/testfiles/CGAL_CFG_USING_BASE_MEMBER_BUG.cpp b/Installation/config/testfiles/CGAL_CFG_USING_BASE_MEMBER_BUG.cpp
deleted file mode 100644
index dfd345d2385..00000000000
--- a/Installation/config/testfiles/CGAL_CFG_USING_BASE_MEMBER_BUG.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright (c) 2004  Utrecht University (The Netherlands),
-// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
-// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
-// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
-// and Tel-Aviv University (Israel).  All rights reserved.
-//
-// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public License as
-// published by the Free Software Foundation; version 2.1 of the License.
-// See the file LICENSE.LGPL distributed with CGAL.
-//
-// Licensees holding a valid commercial license may use this file in
-// accordance with the commercial license agreement provided with the software.
-//
-// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
-// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-//
-// $URL$
-// $Id$
-// 
-//
-// Author(s)     : Menelaos Karavelas, Sylvain Pion
-
-// ---------------------------------------------------------------------
-// A short test program to evaluate a C++ compiler.
-// This program is used by install_cgal.
-// The following documentation will be pasted in the generated configfile.
-// ---------------------------------------------------------------------
-
-//| This flag is set if the compiler doesn't support "using Base::Member;" in
-//| a derived class.  The workaround is to write a forwarder.
-//| At least g++ 2.95 and SunPro CC 5.3 have this bug.
-
-template < typename T >
-void kill_unused_warning(const T&) {}
-
-struct A
-{
-  int operator()(int a) const { return a; }
-};
-
-template<class T>
-struct B : public A
-{
-  using A::operator();
-
-  T operator()(const T& t) const
-  { return t+1; }
-};
-
-
-int main()
-{
-  B<double> b;
-  double d1(0), d2(0);
-
-  d2 = b(d1);
-
-  kill_unused_warning(d1);
-  kill_unused_warning(d2);
-
-  return 0;
-}
diff --git a/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_2/Cartesian_converter.h b/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_2/Cartesian_converter.h
index 6fc8b56fc09..6ab95325544 100644
--- a/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_2/Cartesian_converter.h
+++ b/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_2/Cartesian_converter.h
@@ -118,8 +118,7 @@ public:
     return convert_site(t, intersections_tag());
   }
 
-#if defined(CGAL_CFG_USING_BASE_MEMBER_BUG) || defined(_MSC_VER) \
-    || defined(__sgi)
+#if defined(_MSC_VER) || defined(__sgi)
   K2_Point_2
   operator()(const K1_Point_2& p) const
   {