diff --git a/opt/grub-config b/opt/grub-config
index 49a4901..ccb4e8c 100644
--- a/opt/grub-config
+++ b/opt/grub-config
@@ -4,7 +4,7 @@ OS_NAME="Void Linux USB"
 GRUB_PREFIX="/boot/efi/LOADER/grub"
 CFG_CUSTOM_BEFORE="custom_before.cfg"
 CFG_CUSTOM_AFTER="custom_after.cfg"
-LINUX_CMDLINE=""
+LINUX_CMDLINE="root=/dev/loop0 ro"
 
 DEFAULT_LINUX=/boot/vmlinu?
 if [ ! -f "$DEFAULT_LINUX" ]; then