diff --git a/net/netfilter/nft_nat.c b/net/netfilter/nft_nat.c
index d3b1ffe26181..a0195d28bcfc 100644
--- a/net/netfilter/nft_nat.c
+++ b/net/netfilter/nft_nat.c
@@ -31,8 +31,8 @@ struct nft_nat {
 	enum nft_registers      sreg_addr_max:8;
 	enum nft_registers      sreg_proto_min:8;
 	enum nft_registers      sreg_proto_max:8;
-	int                     family;
-	enum nf_nat_manip_type  type;
+	enum nf_nat_manip_type  type:8;
+	u8			family;
 };
 
 static void nft_nat_eval(const struct nft_expr *expr,
@@ -88,6 +88,7 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 			const struct nlattr * const tb[])
 {
 	struct nft_nat *priv = nft_expr_priv(expr);
+	u32 family;
 	int err;
 
 	if (tb[NFTA_NAT_TYPE] == NULL)
@@ -107,9 +108,12 @@ static int nft_nat_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
 	if (tb[NFTA_NAT_FAMILY] == NULL)
 		return -EINVAL;
 
-	priv->family = ntohl(nla_get_be32(tb[NFTA_NAT_FAMILY]));
-	if (priv->family != AF_INET && priv->family != AF_INET6)
-		return -EINVAL;
+	family = ntohl(nla_get_be32(tb[NFTA_NAT_FAMILY]));
+	if (family != AF_INET && family != AF_INET6)
+		return -EAFNOSUPPORT;
+	if (family != ctx->afi->family)
+		return -EOPNOTSUPP;
+	priv->family = family;
 
 	if (tb[NFTA_NAT_REG_ADDR_MIN]) {
 		priv->sreg_addr_min = ntohl(nla_get_be32(
@@ -202,13 +206,7 @@ static struct nft_expr_type nft_nat_type __read_mostly = {
 
 static int __init nft_nat_module_init(void)
 {
-	int err;
-
-	err = nft_register_expr(&nft_nat_type);
-	if (err < 0)
-		return err;
-
-	return 0;
+	return nft_register_expr(&nft_nat_type);
 }
 
 static void __exit nft_nat_module_exit(void)