--- /dev/null
+From 9d0e3bae096563297c9f51355968f27a67dbfdec Mon Sep 17 00:00:00 2001
+From: Charles Dang <exodia339@gmail.com>
+Date: Mon, 15 Jul 2019 03:18:31 +1100
+Subject: [PATCH] Removed redundant std::ref causing problems with Boost 1.70
+ (fixes #3990)
+
+The asio socket ctor already takes a reference.
+---
+ src/server/server_base.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/server/server_base.cpp b/src/server/server_base.cpp
+index 82b46e912025..8bcf974a62d1 100644
+--- a/src/server/server_base.cpp
++++ b/src/server/server_base.cpp
+@@ -65,7 +65,7 @@ void server_base::start_server()
+
+ void server_base::serve()
+ {
+- socket_ptr socket = std::make_shared<boost::asio::ip::tcp::socket>(std::ref(io_service_));
++ socket_ptr socket = std::make_shared<boost::asio::ip::tcp::socket>(io_service_);
+ acceptor_.async_accept(*socket, std::bind(&server_base::accept_connection, this, _1, socket));
+ }
+