diff -u isc-dhcp-4.1.ESV-R4/debian/changelog isc-dhcp-4.1.ESV-R4/debian/changelog
--- isc-dhcp-4.1.ESV-R4/debian/changelog
+++ isc-dhcp-4.1.ESV-R4/debian/changelog
@@ -1,3 +1,10 @@
+isc-dhcp (4.1.ESV-R4-0ubuntu5.9) precise-proposed; urgency=low
+
+  * debian/dhclient-script.linux: Allow stateless DHCPv6 to complete
+    configuration. (LP: #1214385)
+
+ -- Philipp Kern <pkern@google.com>  Tue, 20 Aug 2013 15:24:27 +0200
+
 isc-dhcp (4.1.ESV-R4-0ubuntu5.8) precise-proposed; urgency=low
 
   [ Dave Chiluk ]
diff -u isc-dhcp-4.1.ESV-R4/debian/dhclient-script.linux isc-dhcp-4.1.ESV-R4/debian/dhclient-script.linux
--- isc-dhcp-4.1.ESV-R4/debian/dhclient-script.linux
+++ isc-dhcp-4.1.ESV-R4/debian/dhclient-script.linux
@@ -360,14 +360,12 @@
         ;;
 
     BOUND6|RENEW6|REBIND6)
-        if [ -z "${new_ip6_address}" ] || [ -z "${new_ip6_prefixlen}" ]; then
-            exit_with_hooks 2
+        if [ "${new_ip6_address}" ] && [ "${new_ip6_prefixlen}" ]; then
+            # set leased IP
+            ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
+                dev ${interface} scope global
         fi
 
-        # set leased IP
-        ip -6 addr add ${new_ip6_address}/${new_ip6_prefixlen} \
-            dev ${interface} scope global
-
         # update /etc/resolv.conf
         if [ "${reason}" = BOUND6 ] ||
            [ "${new_dhcp6_name_servers}" != "${old_dhcp6_name_servers}" ] ||