Index: signals2/detail/signal_template.hpp
===================================================================
--- signals2/detail/signal_template.hpp	(revision 89044)
+++ signals2/detail/signal_template.hpp	(revision 89045)
@@ -401,7 +401,7 @@
         };
         // Destructor of invocation_janitor does some cleanup when a signal invocation completes.
         // Code can't be put directly in signal's operator() due to complications from void return types.
-        class invocation_janitor
+        class invocation_janitor : noncopyable
         {
         public:
           typedef BOOST_SIGNALS2_SIGNAL_IMPL_CLASS_NAME(BOOST_SIGNALS2_NUM_ARGS) signal_type;
Index: function_output_iterator.hpp
===================================================================
--- function_output_iterator.hpp	(revision 89044)
+++ function_output_iterator.hpp	(revision 89045)
@@ -30,7 +30,7 @@
     explicit function_output_iterator(const UnaryFunction& f)
       : m_f(f) {}
 
-    struct output_proxy {
+    struct output_proxy : noncopyable {
       output_proxy(UnaryFunction& f) : m_f(f) { }
       template <class T> output_proxy& operator=(const T& value) {
         m_f(value);