diff -r f56582df55f4 core/renderfarm.cpp
--- a/core/renderfarm.cpp	Sun Jul 23 13:46:05 2017 +0200
+++ b/core/renderfarm.cpp	Thu Mar 22 10:38:17 2018 +0100
@@ -892,7 +892,7 @@
 			stream.rdbuf()->set_option(boost::asio::socket_base::keep_alive(true));
 #if defined(__linux__) || defined(__MACOSX__)
 			// Set keep alive parameters on *nix platforms
-			const int nativeSocket = static_cast<int>(stream.rdbuf()->native());
+			const int nativeSocket = static_cast<int>(stream.rdbuf()->native_handle());
 			int optval = 3; // Retry count
 			const socklen_t optlen = sizeof(optval);
 			setsockopt(nativeSocket, SOL_TCP, TCP_KEEPCNT, &optval, optlen);