diff --git a/target/linux/generic/backport-4.19/020-backport_netfilter_rtcache.patch b/target/linux/generic/backport-4.19/020-backport_netfilter_rtcache.patch
index 32b43082be..3a35381ce3 100644
--- a/target/linux/generic/backport-4.19/020-backport_netfilter_rtcache.patch
+++ b/target/linux/generic/backport-4.19/020-backport_netfilter_rtcache.patch
@@ -209,8 +209,8 @@ Signed-off-by: Florian Westphal <fw@strlen.de>
 +	if (pf == NFPROTO_IPV6) {
 +		const struct rt6_info *rt = (const struct rt6_info *)dst;
 +
-+		if (rt->rt6i_node)
-+			return (u32)rt->rt6i_node->fn_sernum;
++		if (rt->from && rt->from->fib6_node)
++			return (u32)rt->from->fib6_node->fn_sernum;
 +	}
 +#endif
 +	return 0;