--- config.hpp	2012-10-25 02:07:52.000000000 +0200
+++ config.hpp	2013-01-31 14:53:57.887855601 +0100
@@ -92,7 +92,7 @@
 #     undef BOOST_CHRONO_HAS_THREAD_CLOCK
 #     undef BOOST_CHRONO_THREAD_CLOCK_IS_STEADY
 #   endif
-#   if defined(__HP_aCC) && defined(__hpux)
+#   if (defined(__HP_aCC) || defined(__GNUC__)) && defined(__hpux)
 #     undef BOOST_CHRONO_HAS_THREAD_CLOCK
 #     undef BOOST_CHRONO_THREAD_CLOCK_IS_STEADY
 #   endif