/* We assume that systems which don't have IPv6
headers don't have ntop and pton either */
-#if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) && !defined(NO_IPV6)
+#if defined(INET6_ADDRSTRLEN) && !defined(NO_IPV6)
# define HAVE_IPV6
/* We assume that systems which don't have IPv6
headers don't have ntop and pton either */
-#if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) && !defined(NO_IPV6)
+#if defined(INET6_ADDRSTRLEN) && !defined(NO_IPV6)
# define HAVE_IPV6