diff --git a/include/boost/none.hpp b/include/boost/none.hpp
index fc6da93..b94c557 100644
--- a/include/boost/none.hpp
+++ b/include/boost/none.hpp
@@ -16,7 +16,7 @@
 
 namespace boost {
 
-#if BOOST_WORKAROUND(_BORLANDC_, <= 0x564)
+#if BOOST_WORKAROUND(__BORLANDC__, <= 0x564)
 
 namespace detail { struct none_helper{}; }