diff --git a/etc/rc.firewall b/etc/rc.firewall
index 7208023f3cb1..76ae6d504139 100644
--- a/etc/rc.firewall
+++ b/etc/rc.firewall
@@ -1,6 +1,6 @@
 ############
 # Setup system for firewall service.
-# $Id: rc.firewall,v 1.4 1996/08/14 14:41:58 jkh Exp $
+# $Id: rc.firewall,v 1.5 1996/08/19 15:34:29 wosch Exp $
 
 ############
 #
@@ -39,7 +39,7 @@ firewall_type=NONE
 
 ############
 # Flush out the list before we begin.
-/sbin/ipfw flush
+/sbin/ipfw -f flush
 
 ############
 # If you just configured ipfw in the kernel as a tool to solve network