Index: kern/kern_jail.c
===================================================================
--- kern/kern_jail.c	(revision 258672)
+++ kern/kern_jail.c	(working copy)
@@ -314,7 +314,7 @@
 		j.version = j0.version;
 		j.path = j0.path;
 		j.hostname = j0.hostname;
-		j.ip4s = j0.ip_number;
+		j.ip4s = htonl(j0.ip_number);	/* jail_v0 is host order */
 		break;
 	}
 
Index: compat/freebsd32/freebsd32_misc.c
===================================================================
--- compat/freebsd32/freebsd32_misc.c	(revision 258672)
+++ compat/freebsd32/freebsd32_misc.c	(working copy)
@@ -1928,7 +1928,7 @@
 		CP(j32_v0, j, version);
 		PTRIN_CP(j32_v0, j, path);
 		PTRIN_CP(j32_v0, j, hostname);
-		j.ip4s = j32_v0.ip_number;
+		j.ip4s = htonl(j32_v0.ip_number);	/* jail_v0 is host order */
 		break;
 	}