--- D:\projects\boost_root\boost\boost\signals\detail\signals_common.hpp	2003-02-14 15:13:21.000000000 -0600
+++ signals_common.hpp	2003-02-14 15:14:43.000000000 -0600
@@ -45,6 +45,10 @@
 /*****************************************************************************
  ****************************************************************************/
 
+#if !defined(BOOST_SIGNALS_NO_LIB) && !defined(BOOST_SIGNALS_IN_LIBRARY_SOURCE)
+#  include <boost/signals/detail/signals_library_include.hpp>
+#endif
+
 #include <boost/type_traits/conversion_traits.hpp>
 #include <boost/ref.hpp>