diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index 75bfc4aa..c048b896 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -9,6 +9,8 @@
 //  config for libstdc++ v3
 //  not much to go in here:
 
+#define BOOST_GNU_STDLIB 1
+
 #ifdef __GLIBCXX__
 #define BOOST_STDLIB "GNU libstdc++ version " BOOST_STRINGIZE(__GLIBCXX__)
 #else
diff --git a/include/boost/config/stdlib/roguewave.hpp b/include/boost/config/stdlib/roguewave.hpp
index dcd0af84..31c7bdda 100644
--- a/include/boost/config/stdlib/roguewave.hpp
+++ b/include/boost/config/stdlib/roguewave.hpp
@@ -10,6 +10,8 @@
 
 //  Rogue Wave std lib:
 
+#define BOOST_RW_STDLIB 1 
+
 #if !defined(__STD_RWCOMPILER_H__) && !defined(_RWSTD_VER)
 #  include <boost/config/no_tr1/utility.hpp>
 #  if !defined(__STD_RWCOMPILER_H__) && !defined(_RWSTD_VER)