diff --git a/include/boost/config/stdlib/roguewave.hpp b/include/boost/config/stdlib/roguewave.hpp
index fad076dd..95ac36c6 100644
--- a/include/boost/config/stdlib/roguewave.hpp
+++ b/include/boost/config/stdlib/roguewave.hpp
@@ -154,12 +154,14 @@
 #  endif
 #endif
 
-//  C++0x headers not yet implemented
-//
 #if _RWSTD_VER < 0x05000000
 #  define BOOST_NO_0X_HDR_ARRAY
-#  define BOOST_NO_0X_HDR_TYPE_TRAITS
 #endif
+// type_traits header is incomplete:
+#  define BOOST_NO_0X_HDR_TYPE_TRAITS
+//
+//  C++0x headers not yet implemented
+//
 #  define BOOST_NO_0X_HDR_CHRONO
 #  define BOOST_NO_0X_HDR_CODECVT
 #  define BOOST_NO_0X_HDR_CONDITION_VARIABLE