diff --git a/src/include/lwip/tcp.h b/src/include/lwip/tcp.h
index 3fb1ef98..d52040f9 100644
--- a/src/include/lwip/tcp.h
+++ b/src/include/lwip/tcp.h
@@ -399,6 +399,9 @@ err_t            tcp_output  (struct tcp_pcb *pcb);
 
 const char* tcp_debug_state_str(enum tcp_state s);
 
+/* for compatibility with older implementation */
+#define tcp_new_ip6() tcp_new_ip_type(IPADDR_TYPE_V6)
+
 #ifdef __cplusplus
 }
 #endif