1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 004fffb6c221..f0a8ff9ed891 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1176,7 +1176,7 @@ void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
 
         memset(&fl6, 0, sizeof(fl6));
         fl6.flowi6_oif = oif;
-        fl6.flowi6_mark = mark;
+        fl6.flowi6_mark = mark ? mark : IP6_REPLY_MARK(net, skb->mark);
         fl6.daddr = iph->daddr;
         fl6.saddr = iph->saddr;
         fl6.flowlabel = ip6_flowinfo(iph);