diff --git a/src/include/lwip/sockets.h b/src/include/lwip/sockets.h
index 853beea8..74cd252c 100644
--- a/src/include/lwip/sockets.h
+++ b/src/include/lwip/sockets.h
@@ -423,6 +423,20 @@ int lwip_fcntl(int s, int cmd, int val);
 #define fcntl(a,b,c)          lwip_fcntl(a,b,c)
 #endif /* LWIP_POSIX_SOCKETS_IO_NAMES */
 
+#if LWIP_IPV6
+#define inet_ntop(af,src,dst,size) \
+    (((af) == AF_INET6) ? ip6addr_ntoa_r((src),(dst),(size)) \
+     : (((af) == AF_INET) ? ipaddr_ntoa_r((src),(dst),(size)) : NULL))
+#define inet_pton(af,src,dst) \
+    (((af) == AF_INET6) ? inet6_aton((src),(dst)) \
+     : (((af) == AF_INET) ? inet_aton((src),(dst)) : 0))
+#else /* LWIP_IPV6 */
+#define inet_ntop(af,src,dst,size) \
+    (((af) == AF_INET) ? ipaddr_ntoa_r((src),(dst),(size)) : NULL)
+#define inet_pton(af,src,dst) \
+    (((af) == AF_INET) ? inet_aton((src),(dst)) : 0)
+#endif /* LWIP_IPV6 */
+
 #endif /* LWIP_COMPAT_SOCKETS */
 
 #ifdef __cplusplus