--- boost/config/stdlib/libstdcpp3.hpp	2012-07-15 15:40:43.000000000 -0300
+++ boost/config/stdlib/libstdcpp3.hpp.old	2012-07-15 15:40:04.000000000 -0300
@@ -33,8 +33,7 @@
 
 #ifdef __GLIBCXX__ // gcc 3.4 and greater:
 #  if defined(_GLIBCXX_HAVE_GTHR_DEFAULT) \
-        || defined(_GLIBCXX__PTHREADS) \
-        || defined(_GLIBCXX_HAS_GTHREADS)
+        || defined(_GLIBCXX__PTHREADS)
       //
       // If the std lib has thread support turned on, then turn it on in Boost
       // as well.  We do this because some gcc-3.4 std lib headers define _REENTANT