diff --git a/include/boost/static_assert.hpp b/include/boost/static_assert.hpp
index fd7b224..0c9c5a5 100644
--- a/include/boost/static_assert.hpp
+++ b/include/boost/static_assert.hpp
@@ -36,7 +36,7 @@
 #     define BOOST_STATIC_ASSERT_MSG( B, Msg ) BOOST_STATIC_ASSERT( B )
 #endif
 
-#ifdef __BORLANDC__
+#ifdef BOOST_BORLANDC
 //
 // workaround for buggy integral-constant expression support:
 #define BOOST_BUGGY_INTEGRAL_CONSTANT_EXPRESSIONS