diff --git a/package/busybox/udhcpc.script b/package/busybox/udhcpc.script
index c2804a3b5a..711963f974 100755
--- a/package/busybox/udhcpc.script
+++ b/package/busybox/udhcpc.script
@@ -11,6 +11,24 @@ RESOLV_CONF="/etc/resolv.conf"
 # Handle stateful DHCPv6 like DHCPv4
 [ -n "$ipv6" ] && ip="$ipv6/128"
 
+if [ -z "${IF_WAIT_DELAY}" ]; then
+	IF_WAIT_DELAY=10
+fi
+
+wait_for_ipv6_default_route() {
+	printf "Waiting for IPv6 default route to appear"
+	while [ $IF_WAIT_DELAY -gt 0 ]; do
+		if [ -z "$(ip -6 route list | grep default)" ]; then
+			printf "\n"
+			return
+		fi
+		sleep 1
+		printf "."
+		: $((IF_WAIT_DELAY -= 1))
+	done
+	printf " timeout!\n"
+}
+
 case "$1" in
 	deconfig)
 		/sbin/ifconfig $interface up
@@ -39,6 +57,9 @@ case "$1" in
 			/usr/sbin/avahi-autoipd -k $interface
 		fi
 		/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
+		if [ -n "$ipv6" ] ; then
+			wait_for_ipv6_default_route
+		fi
 
 		if [ -n "$router" ] ; then
 			echo "deleting routers"