diff --git a/include/boost/config/platform/macos.hpp b/include/boost/config/platform/macos.hpp
index 6d876b12..5be4e3b3 100644
--- a/include/boost/config/platform/macos.hpp
+++ b/include/boost/config/platform/macos.hpp
@@ -47,7 +47,7 @@
 #    define BOOST_NO_STDC_NAMESPACE
 #  endif
 
-#  if (__GNUC__ == 4)
+#  if (__GNUC__ >= 4)
 
 // Both gcc and intel require these.  
 #    define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE