diff --git a/lib/vty.c b/lib/vty.c
index 6cb8b48..ccf6640 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -1924,11 +1924,11 @@
   memset (&serv, 0, sizeof (struct sockaddr_un));
   serv.sun_family = AF_UNIX;
   strncpy (serv.sun_path, path, strlen (path));
-#ifdef HAVE_SUN_LEN
+#ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
   len = serv.sun_len = SUN_LEN(&serv);
 #else
   len = sizeof (serv.sun_family) + strlen (serv.sun_path);
-#endif /* HAVE_SUN_LEN */
+#endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */
 
   ret = bind (sock, (struct sockaddr *) &serv, len);
   if (ret < 0)