diff --git a/Packages/Interval_arithmetic/include/CGAL/Static_filters/Orientation_2.h b/Packages/Interval_arithmetic/include/CGAL/Static_filters/Orientation_2.h
index f39f8ff82b6..fe2182c519c 100644
--- a/Packages/Interval_arithmetic/include/CGAL/Static_filters/Orientation_2.h
+++ b/Packages/Interval_arithmetic/include/CGAL/Static_filters/Orientation_2.h
@@ -34,14 +34,33 @@ class SF_Orientation_2
   : public K_base::Orientation_2
 {
   typedef typename K_base::Point_2          Point_2;
+  typedef typename K_base::Vector_2         Vector_2;
+  typedef typename K_base::Circle_2          Circle_2;
+
   typedef typename K_base::Orientation_2    Base;
 
 public:
 
-  using Base::operator();
+  typedef typename Base::result_type  result_type;
 
+#ifndef CGAL_CFG_MATCHING_BUG_6
+  using Base::operator();
+#else 
+  result_type
+  operator()(const Vector_2& u, const Vector_2& v) const
+  { 
+    return Base::operator()(u,v);
+  }
+  
+  result_type
+  operator()(const Circle_2& c) const
+  {
+    return Base::operator()(c);
+  }
+#endif
   Orientation
   operator()(const Point_2 &p, const Point_2 &q, const Point_2 &r) const
+
   {
       CGAL_PROFILER("Orientation_2 calls");