Index: boost/config/compiler/gcc.hpp
===================================================================
--- boost/config/compiler/gcc.hpp	(revision 83595)
+++ boost/config/compiler/gcc.hpp	(working copy)
@@ -236,12 +236,17 @@
 #define BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
 #endif
 
+// C++0x features in 4.7.n and later
+//
 #if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7) || !defined(__GXX_EXPERIMENTAL_CXX0X__)
 #  define BOOST_NO_CXX11_TEMPLATE_ALIASES
 #endif
-// C++0x features not supported at all yet
+
+// C++0x features in 4.8.1 and later
 //
-#define BOOST_NO_CXX11_DECLTYPE_N3276
+#if (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__ < 40801) || !defined(__GXX_EXPERIMENTAL_CXX0X__)
+#  define BOOST_NO_CXX11_DECLTYPE_N3276
+#endif
 
 #ifndef BOOST_COMPILER
 #  define BOOST_COMPILER "GNU C++ version " __VERSION__