diff --git a/src/server.c b/src/server.c
index cd90253..7ba3242 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1056,8 +1056,8 @@ int patty_ax25_server_run(patty_ax25_server *server) {
     while (1) {
         int nready;
 
-        FD_COPY(&server->fds_watch, &server->fds_r);
-        FD_COPY(&server->fds_watch, &server->fds_w);
+        memcpy(&server->fds_r, &server->fds_watch, sizeof(server->fds_r));
+        memcpy(&server->fds_w, &server->fds_watch, sizeof(server->fds_w));
 
         if ((nready = select( server->fd_max,
                              &server->fds_r,