diff --git a/machines/sirius/disko.nix b/machines/sirius/disko.nix
index b9595c6..f282b6b 100644
--- a/machines/sirius/disko.nix
+++ b/machines/sirius/disko.nix
@@ -48,7 +48,7 @@ in
                 format = "f2fs";
                 mountpoint = "/";
                 extraArgs = [
-                  "-0"
+                  "-O"
                   "extra_attr,inode_checksum,sb_checksum,compression"
                 ];
                 mountOptions = [ "compress_algorithm=zstd:6,compress_chksum,atgc,gc_merge,lazytime,nodiscard" ];