diff --git a/include/boost/ref.hpp b/include/boost/ref.hpp
index 60a834b..a8d996c 100644
--- a/include/boost/ref.hpp
+++ b/include/boost/ref.hpp
@@ -52,7 +52,7 @@ private:
     T* t_;
 };
 
-# if defined(__BORLANDC__) && (__BORLANDC__ <= 0x560)
+# if defined(__BORLANDC__) && (__BORLANDC__ <= 0x570)
 #  define BOOST_REF_CONST
 # else
 #  define BOOST_REF_CONST const