diff --git a/recipes-core/initrdscripts/files/init-install.sh b/recipes-core/initrdscripts/files/init-install.sh
index d33bf37..0a02368 100644
--- a/recipes-core/initrdscripts/files/init-install.sh
+++ b/recipes-core/initrdscripts/files/init-install.sh
@@ -159,6 +159,7 @@ if [ -f /etc/grub.d/40_custom ] ; then
     sed -i "s/__VGA_MODE__/$4/g" $GRUBCFG
     sed -i "s/__CONSOLE__/$5/g" $GRUBCFG
     sed -i "s/quiet/net.ifnames=0 quiet/g" $GRUBCFG
+    sed -i "s/rw/ro/g" $GRUBCFG
     sed -i "/#/d" $GRUBCFG
     sed -i "/exec tail/d" $GRUBCFG
     chmod 0444 $GRUBCFG