diff --git a/include/boost/detail/utf8_codecvt_facet.hpp b/include/boost/detail/utf8_codecvt_facet.hpp
index 936bb9d..88da207 100644
--- a/include/boost/detail/utf8_codecvt_facet.hpp
+++ b/include/boost/detail/utf8_codecvt_facet.hpp
@@ -92,7 +92,7 @@
 namespace std {
     #if defined(__LIBCOMO__)
         using ::mbstate_t;
-    #elif defined(BOOST_DINKUMWARE_STDLIB)
+    #elif defined(BOOST_DINKUMWARE_STDLIB) && !defined(__BORLANDC__)
         using ::mbstate_t;
     #elif defined(__SGI_STL_PORT)
     #elif defined(BOOST_NO_STDC_NAMESPACE)