diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
index 701bc358ab9..2056bafee1f 100644
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -105,9 +105,9 @@ __FBSDID("$FreeBSD$");
  * packets that would otherwise be discarded due to bad checksums, and may
  * cause problems (especially for NFS data blocks).
  */
-static int	udp_cksum = 1;
-SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, &udp_cksum,
-    0, "compute udp checksum");
+VNET_DEFINE(int, udp_cksum) = 1;
+SYSCTL_VNET_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
+    &VNET_NAME(udp_cksum), 0, "compute udp checksum");
 
 int	udp_log_in_vain = 0;
 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
@@ -1212,7 +1212,7 @@ udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
 	/*
 	 * Set up checksum and output datagram.
 	 */
-	if (udp_cksum) {
+	if (V_udp_cksum) {
 		if (inp->inp_flags & INP_ONESBCAST)
 			faddr.s_addr = INADDR_BROADCAST;
 		ui->ui_sum = in_pseudo(ui->ui_src.s_addr, faddr.s_addr,
diff --git a/sys/netinet/udp_var.h b/sys/netinet/udp_var.h
index 6e5abd05c21..e4a6668c028 100644
--- a/sys/netinet/udp_var.h
+++ b/sys/netinet/udp_var.h
@@ -139,8 +139,10 @@ VNET_DECLARE(struct inpcbinfo, udbinfo);
 
 extern u_long			udp_sendspace;
 extern u_long			udp_recvspace;
+VNET_DECLARE(int, udp_cksum);
 VNET_DECLARE(struct udpstat, udpstat);
 VNET_DECLARE(int, udp_blackhole);
+#define	V_udp_cksum		VNET(udp_cksum)
 #define	V_udpstat		VNET(udpstat)
 #define	V_udp_blackhole		VNET(udp_blackhole)
 extern int			udp_log_in_vain;