diff --git a/etc/rc b/etc/rc
index ea0c4b303e45..de5fe065b64d 100644
--- a/etc/rc
+++ b/etc/rc
@@ -1,5 +1,5 @@
 #!/bin/sh
-#	$Id: rc,v 1.25 1994/06/04 00:43:59 ache Exp $
+#	$Id: rc,v 1.26 1994/06/05 16:03:57 ats Exp $
 #	From: @(#)rc	5.27 (Berkeley) 6/5/91
 
 # System startup script run by init on autoboot
@@ -59,6 +59,12 @@ trap "echo 'Reboot interrupted'; exit 1" 3
 
 swapon -a
 
+# Check for diskless boot, and remount the root RW.
+a=`mount`
+if [ 0 != `expr "$a" : '^[^/]*:/.* on /'` ] ; then
+        mount -u -o rw /
+fi
+
 umount -a >/dev/null 2>&1
 mount -a -t nonfs
 rm -f /fastboot		# XXX (root now writeable)