diff -ur dnsmasq-2.42.orig/src/netlink.c dnsmasq-2.42/src/netlink.c
--- dnsmasq-2.42.orig/src/netlink.c	2008-06-03 16:38:25.000000000 +0200
+++ dnsmasq-2.42/src/netlink.c	2008-06-03 16:41:06.000000000 +0200
@@ -21,6 +21,10 @@
 #include <linux/types.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
+#ifndef IFA_RTA
+# include "linux/if_addr.h"
+# define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#endif
 
 /* linux 2.6.19 buggers up the headers, patch it up here. */ 
 #ifndef IFA_RTA