diff --git a/include/boost/python/scope.hpp b/include/boost/python/scope.hpp
index 50047bd9..7262f8da 100644
--- a/include/boost/python/scope.hpp
+++ b/include/boost/python/scope.hpp
@@ -12,7 +12,8 @@
 
 namespace boost { namespace python { 
 
-class BOOST_PYTHON_DECL scope : public object, noncopyable
+class BOOST_PYTHON_DECL scope
+    : public object, private noncopyable
 {
  public:
     inline scope(object const&);