diff --git a/etc/rc.devfs b/etc/rc.devfs
index 52966e9a63ca..5125727e52c2 100644
--- a/etc/rc.devfs
+++ b/etc/rc.devfs
@@ -1,3 +1,4 @@
+#!/bin/sh -
 # Copyright (c) 1998  Søren Schmidt
 # All rights reserved.
 #
diff --git a/etc/rc.firewall b/etc/rc.firewall
index 57ce6bf2c575..75179e529d10 100644
--- a/etc/rc.firewall
+++ b/etc/rc.firewall
@@ -1,3 +1,4 @@
+#!/bin/sh -
 # Copyright (c) 1996  Poul-Henning Kamp
 # All rights reserved.
 #
diff --git a/etc/rc.firewall6 b/etc/rc.firewall6
index a8cd69c7290e..12f23cb97e43 100644
--- a/etc/rc.firewall6
+++ b/etc/rc.firewall6
@@ -1,3 +1,4 @@
+#!/bin/sh -
 ############
 # Setup system for IPv6 firewall service.
 # $FreeBSD$