diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
--- a/sys/kern/kern_jail.c
+++ b/sys/kern/kern_jail.c
@@ -654,7 +654,7 @@
 	if (ppr->pr_addrs[af] != NULL) {
 		pr->pr_addrs[af] = prison_ip_alloc(af,
 		    ppr->pr_addrs[af]->ips, M_WAITOK);
-		bcopy(ppr->pr_addrs[af], pr->pr_addrs[af],
+		bcopy(ppr->pr_addrs[af] + 1, pr->pr_addrs[af] + 1,
 		    pr->pr_addrs[af]->ips * pr_families[af].size);
 	}
 }