--- boost_1_55_0/boost/asio/detail/socket_types.hpp	2014-08-31 12:43:54.186255800 -0500
+++ boost_1_55_0/boost/asio/detail/socket_types.hpp	2014-08-31 12:43:03.887868700 -0500
@@ -332,7 +332,11 @@ typedef int signed_size_type;
 # define BOOST_ASIO_OS_DEF_MSG_OOB MSG_OOB
 # define BOOST_ASIO_OS_DEF_MSG_PEEK MSG_PEEK
 # define BOOST_ASIO_OS_DEF_MSG_DONTROUTE MSG_DONTROUTE
+#ifdef MSG_EOR
 # define BOOST_ASIO_OS_DEF_MSG_EOR MSG_EOR
+#else
+# define BOOST_ASIO_OS_DEF_MSG_EOR 0
+#endif
 # define BOOST_ASIO_OS_DEF_SHUT_RD SHUT_RD
 # define BOOST_ASIO_OS_DEF_SHUT_WR SHUT_WR
 # define BOOST_ASIO_OS_DEF_SHUT_RDWR SHUT_RDWR