diff --git a/include/proto/proto_tcp.h b/include/proto/proto_tcp.h
index a41e025..d55f4c5 100644
--- a/include/proto/proto_tcp.h
+++ b/include/proto/proto_tcp.h
@@ -30,7 +30,7 @@
 int tcp_bind_socket(int fd, int flags, struct sockaddr_storage *local, struct sockaddr_storage *remote);
 void tcpv4_add_listener(struct listener *listener);
 void tcpv6_add_listener(struct listener *listener);
-int tcp_connect_server(struct connection *conn, int data);
+int tcp_connect_server(struct connection *conn, int data, int delack);
 int tcp_connect_probe(struct connection *conn);
 int tcp_get_src(int fd, struct sockaddr *sa, socklen_t salen, int dir);
 int tcp_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir);
diff --git a/include/proto/stream_interface.h b/include/proto/stream_interface.h
index 7c9595a..c8202bc 100644
--- a/include/proto/stream_interface.h
+++ b/include/proto/stream_interface.h
@@ -111,7 +111,7 @@
 	if (unlikely(!si_ctrl(si) || !si_ctrl(si)->connect))
 		return SN_ERR_INTERNAL;
 
-	ret = si_ctrl(si)->connect(si->conn, !channel_is_empty(si->ob));
+	ret = si_ctrl(si)->connect(si->conn, !channel_is_empty(si->ob), !!si->send_proxy_ofs);
 	if (ret != SN_ERR_NONE)
 		return ret;