add backslash
diff --git a/onos-setup.sh b/onos-setup.sh
index 5cc2a46..cef160e 100644
--- a/onos-setup.sh
+++ b/onos-setup.sh
@@ -35,5 +35,5 @@
 
 sudo echo 'export ONOS_OPT="clean debug"' > /opt/onos/options
 
-sudo su -c 'echo GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" >> /etc/default/grub'
+sudo su -c 'echo GRUB_CMDLINE_LINUX_DEFAULT=\"quiet splash\" >> /etc/default/grub'
 sudo su -c update-grub