diff --git a/libcxx/include/exception b/libcxx/include/exception
--- a/libcxx/include/exception
+++ b/libcxx/include/exception
@@ -320,11 +320,7 @@
 template <class _Tp, class _Up>
 struct __throw_with_nested<_Tp, _Up, false> {
     _LIBCPP_NORETURN static inline _LIBCPP_INLINE_VISIBILITY void
-#ifndef _LIBCPP_CXX03_LANG
     __do_throw(_Tp&& __t)
-#else
-    __do_throw (_Tp& __t)
-#endif // _LIBCPP_CXX03_LANG
     {
         throw static_cast<_Tp&&>(__t);
     }