diff -ur dnsmasq-2.42.orig/src/config.h dnsmasq-2.42/src/config.h
--- dnsmasq-2.42.orig/src/config.h	2008-06-03 16:38:25.000000000 +0200
+++ dnsmasq-2.42/src/config.h	2008-06-03 16:38:43.000000000 +0200
@@ -322,8 +322,9 @@
 /* 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
+#  define IPV6_V6ONLY  26
 #  define ADDRSTRLEN INET6_ADDRSTRLEN
 #  if defined(SOL_IPV6)
 #    define IPV6_LEVEL SOL_IPV6