diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index ae74ede..5640425 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -208,6 +208,7 @@
 	DEVCONF_MC_FORWARDING,
 	DEVCONF_DISABLE_IPV6,
 	DEVCONF_ACCEPT_DAD,
+	DEVCONF_FORCE_TLLAO,
 	DEVCONF_MAX
 };