--- D:\projects\boost_root\boost\boost\signals\detail\signal_base.hpp	2002-08-09 09:29:35.000000000 -0500
+++ signal_base.hpp	2003-02-13 23:42:53.000000000 -0600
@@ -71,7 +71,7 @@
 
       // Must be constructed before calling the slots, because it safely
       // manages call depth
-      class call_notification {
+      class BOOST_SIGNALS_DECL call_notification {
       public:
         call_notification(const shared_ptr<signal_base_impl>&);
         ~call_notification();
@@ -81,7 +81,7 @@
         
       // Implementation of base class for all signals. It handles the 
       // management of the underlying slot lists.
-      class signal_base_impl {
+      class BOOST_SIGNALS_DECL signal_base_impl {
       public:
         friend class call_notification;
 
@@ -152,7 +152,7 @@
         mutable slot_container_type slots_;
       };
 
-      class signal_base : public noncopyable {
+      class BOOST_SIGNALS_DECL signal_base : public noncopyable {
       public:
         typedef signal_base_impl::compare_type compare_type;