Index: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
@@ -1335,28 +1335,29 @@
 		do_csum = 0;
 
 	/* receive side checksum offload */
-	if (info->csum_info != NULL) {
+	if (info->csum_info != HN_NDIS_RXCSUM_INFO_INVALID) {
 		/* IP csum offload */
-		if (info->csum_info->receive.ip_csum_succeeded && do_csum) {
+		if ((info->csum_info & NDIS_RXCSUM_INFO_IPCS_OK) && do_csum) {
 			m_new->m_pkthdr.csum_flags |=
 			    (CSUM_IP_CHECKED | CSUM_IP_VALID);
 			rxr->hn_csum_ip++;
 		}
 
 		/* TCP/UDP csum offload */
-		if ((info->csum_info->receive.tcp_csum_succeeded ||
-		     info->csum_info->receive.udp_csum_succeeded) && do_csum) {
+		if ((info->csum_info & (NDIS_RXCSUM_INFO_UDPCS_OK |
+		     NDIS_RXCSUM_INFO_TCPCS_OK)) && do_csum) {
 			m_new->m_pkthdr.csum_flags |=
 			    (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
 			m_new->m_pkthdr.csum_data = 0xffff;
-			if (info->csum_info->receive.tcp_csum_succeeded)
+			if (info->csum_info & NDIS_RXCSUM_INFO_TCPCS_OK)
 				rxr->hn_csum_tcp++;
 			else
 				rxr->hn_csum_udp++;
 		}
 
-		if (info->csum_info->receive.ip_csum_succeeded &&
-		    info->csum_info->receive.tcp_csum_succeeded)
+		if ((info->csum_info &
+		     (NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK)) ==
+		    (NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK))
 			do_lro = 1;
 	} else {
 		const struct ether_header *eh;
Index: head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
===================================================================
--- head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
+++ head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
@@ -157,7 +157,7 @@
 	uint32_t mask = 0, len;
 
 	info->vlan_info = HN_NDIS_VLAN_INFO_INVALID;
-	info->csum_info = NULL;
+	info->csum_info = HN_NDIS_RXCSUM_INFO_INVALID;
 	info->hash_info = NULL;
 	info->hash_value = NULL;
 
@@ -200,10 +200,9 @@
 			break;
 
 		case tcpip_chksum_info:
-			if (__predict_false(dlen <
-			    sizeof(rndis_tcp_ip_csum_info)))
+			if (__predict_false(dlen < NDIS_RXCSUM_INFO_SIZE))
 				return (EINVAL);
-			info->csum_info = data;
+			info->csum_info = *((const uint32_t *)data);
 			mask |= HV_RF_RECVINFO_CSUM;
 			break;
 
Index: head/sys/dev/hyperv/netvsc/if_hnvar.h
===================================================================
--- head/sys/dev/hyperv/netvsc/if_hnvar.h
+++ head/sys/dev/hyperv/netvsc/if_hnvar.h
@@ -56,10 +56,11 @@
 struct rndis_tcp_ip_csum_info_;
 
 #define HN_NDIS_VLAN_INFO_INVALID	0xffffffff
+#define HN_NDIS_RXCSUM_INFO_INVALID	0
 
 struct hn_recvinfo {
 	uint32_t			vlan_info;
-	const struct rndis_tcp_ip_csum_info_ *csum_info;
+	uint32_t			csum_info;
 	const struct rndis_hash_info	*hash_info;
 	const struct rndis_hash_value	*hash_value;
 };
Index: head/sys/dev/hyperv/netvsc/ndis.h
===================================================================
--- head/sys/dev/hyperv/netvsc/ndis.h
+++ head/sys/dev/hyperv/netvsc/ndis.h
@@ -219,4 +219,16 @@
 #define	NDIS_VLAN_INFO_CFI(inf)		(((inf) & NDIS_VLAN_INFO_CFI_MASK) >> 3)
 #define	NDIS_VLAN_INFO_PRI(inf)		((inf) & NDIS_VLAN_INFO_PRI_MASK)
 
+/* Reception checksum */
+#define	NDIS_RXCSUM_INFO_SIZE		sizeof(uint32_t)
+#define	NDIS_RXCSUM_INFO_TCPCS_FAILED	0x0001
+#define	NDIS_RXCSUM_INFO_UDPCS_FAILED	0x0002
+#define	NDIS_RXCSUM_INFO_IPCS_FAILED	0x0004
+#define	NDIS_RXCSUM_INFO_TCPCS_OK	0x0008
+#define	NDIS_RXCSUM_INFO_UDPCS_OK	0x0010
+#define	NDIS_RXCSUM_INFO_IPCS_OK	0x0020
+#define	NDIS_RXCSUM_INFO_LOOPBACK	0x0040
+#define	NDIS_RXCSUM_INFO_TCPCS_INVAL	0x0080
+#define	NDIS_RXCSUM_INFO_IPCS_INVAL	0x0100
+
 #endif	/* !_NET_NDIS_H_ */