diff --git a/src/network/core/tcp_listen.h b/src/network/core/tcp_listen.h
--- a/src/network/core/tcp_listen.h
+++ b/src/network/core/tcp_listen.h
@@ -114,7 +114,7 @@ public:
 
 		/* take care of listener port */
 		for (auto &s : sockets) {
-			FD_SET(s.second, &read_fd);
+			FD_SET(s.first, &read_fd);
 		}
 
 		tv.tv_sec = tv.tv_usec = 0; // don't block at all.
@@ -122,7 +122,7 @@ public:
 
 		/* accept clients.. */
 		for (auto &s : sockets) {
-			if (FD_ISSET(s.second, &read_fd)) AcceptClient(s.second);
+			if (FD_ISSET(s.first, &read_fd)) AcceptClient(s.first);
 		}
 
 		/* read stuff from clients */
@@ -164,7 +164,7 @@ public:
 	static void CloseListeners()
 	{
 		for (auto &s : sockets) {
-			closesocket(s.second);
+			closesocket(s.first);
 		}
 		sockets.clear();
 		Debug(net, 5, "[{}] Closed listeners", Tsocket::GetName());