diff --git a/containers/usr/lib/bootc/kargs.d/10-rootflags.toml b/containers/usr/lib/bootc/kargs.d/10-rootflags.toml
new file mode 100644
index 0000000..9827864
--- /dev/null
+++ b/containers/usr/lib/bootc/kargs.d/10-rootflags.toml
@@ -0,0 +1 @@
+kargs = ["rootflags=subvol=root,compress-force=zstd:1"]