--- kernel/bsd/kern/init_main.c	2018/04/24 18:26:01	1.1
+++ kernel/bsd/kern/init_main.c	2018/04/24 18:27:36	1.1.1.2
@@ -426,7 +426,7 @@ main()
 	p->p_ucred->cr_ngroups = 1;	/* group 0 */
 
 	/* Create the file descriptor table. */
-	filedesc0.fd_refcnt = 1;
+	filedesc0.fd_refcnt = 1+1; /* +1 so shutdown will not _FREE_ZONE */
 	p->p_fd = &filedesc0;
 	filedesc0.fd_cmask = cmask;