diff -Nru ppp-2.4.4.orig/pppd/ipv6cp.c ppp-2.4.4/pppd/ipv6cp.c
--- ppp-2.4.4.orig/pppd/ipv6cp.c	2005-08-26 02:59:34.000000000 +0300
+++ ppp-2.4.4/pppd/ipv6cp.c	2007-05-28 20:00:33.000000000 +0300
@@ -153,6 +153,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <stdlib.h>
 #include <netdb.h>
 #include <sys/param.h>
 #include <sys/types.h>