diff --git a/src/torrent_peer.cpp b/src/torrent_peer.cpp
index 222964acb..a363bbec4 100644
--- a/src/torrent_peer.cpp
+++ b/src/torrent_peer.cpp
@@ -36,8 +36,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/peer_connection.hpp"
 #include "libtorrent/crc32c.hpp"
 #include "libtorrent/ip_voter.hpp"
-
-#include <boost/detail/endian.hpp> // for BIG_ENDIAN and LITTLE_ENDIAN macros
+#include "libtorrent/io.hpp" // for write_uint16
 
 namespace libtorrent {
 
@@ -84,15 +83,9 @@ namespace libtorrent {
 			if (e1.port() > e2.port())
 				swap(e1, e2);
 			std::uint32_t p;
-#if defined BOOST_BIG_ENDIAN
-			p = std::uint32_t(e1.port() << 16);
-			p |= e2.port();
-#elif defined BOOST_LITTLE_ENDIAN
-			p = std::uint32_t(aux::host_to_network(e2.port()) << 16);
-			p |= aux::host_to_network(e1.port());
-#else
-#error unsupported endianness
-#endif
+			auto ptr = reinterpret_cast<char*>(&p);
+			detail::write_uint16(e1.port(), ptr);
+			detail::write_uint16(e2.port(), ptr);
 			ret = crc32c_32(p);
 		}
 #if TORRENT_USE_IPV6