diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 22c8ea9..e7197be 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -196,6 +196,7 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
 	struct sk_buff *prev, *next;
 	unsigned int payload_len;
 	int offset, end;
+	struct net_device *dev = NULL;
 
 	if (fq->q.last_in & INET_FRAG_COMPLETE) {
 		pr_debug("Already completed\n");
@@ -311,7 +312,11 @@ found:
 	else
 		fq->q.fragments = skb;
 
-	skb->dev = NULL;
+	dev = skb->dev;
+	if (dev) {
+		fq->iif = dev->ifindex;
+		skb->dev = NULL;
+	}
 	fq->q.stamp = skb->tstamp;
 	fq->q.meat += skb->len;
 	if (payload_len > fq->q.max_size)