diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c
index 7b5212220185..d1070aec7b72 100644
--- a/net/ipv6/seg6_local.c
+++ b/net/ipv6/seg6_local.c
@@ -257,10 +257,13 @@ static bool decap_and_validate(struct sk_buff *skb, int proto)
 		return false;
 
 	if (proto == IPPROTO_IPIP) {
+		bool l3slave = ipv6_l3mdev_skb(IP6CB(skb)->flags);
 		int iif = IP6CB(skb)->iif;
 
 		memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
 		IPCB(skb)->iif = iif;
+		if (l3slave)
+			IPCB(skb)->flags |= IPSKB_L3SLAVE;
 	} else if (proto == IPPROTO_IPV6) {
 		bool l3slave = ipv6_l3mdev_skb(IP6CB(skb)->flags);
 		int iif = IP6CB(skb)->iif;