diff --git a/include/boost/functional/detail/float_functions.hpp b/include/boost/functional/detail/float_functions.hpp
index 4ec9767..5cef36e 100644
--- a/include/boost/functional/detail/float_functions.hpp
+++ b/include/boost/functional/detail/float_functions.hpp
@@ -60,7 +60,7 @@
 #  endif
 
 // Dinkumware.
-#elif ((defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)) && !defined(__BORLANDC__)
+#elif (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
 // Some versions of Visual C++ don't seem to have the C++ overloads but they
 // all seem to have the c99 float overloads
 #  if defined(BOOST_MSVC)