diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 27747deb96ed8..edb3dc32f1daf 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -378,7 +378,7 @@ enum ip_conntrack_info;
 struct nlattr;
 
 struct nfnl_ct_hook {
-	struct nf_conn *(*get_ct)(struct sk_buff *skb,
+	struct nf_conn *(*get_ct)(const struct sk_buff *skb,
 				  enum ip_conntrack_info *ctinfo);
 	size_t (*build_size)(const struct nf_conn *ct);
 	int (*build)(struct sk_buff *skb, struct nf_conn *ct,
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 71d6ada9996e7..9f5272968abb0 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2162,7 +2162,7 @@ ctnetlink_glue_build_size(const struct nf_conn *ct)
 	       ;
 }
 
-static struct nf_conn *ctnetlink_glue_get_ct(struct sk_buff *skb,
+static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb,
 					     enum ip_conntrack_info *ctinfo)
 {
 	struct nf_conn *ct;