diff --git a/rcore-fs-sfs/src/lib.rs b/rcore-fs-sfs/src/lib.rs
index 871c611..be79aac 100644
--- a/rcore-fs-sfs/src/lib.rs
+++ b/rcore-fs-sfs/src/lib.rs
@@ -868,9 +868,10 @@ impl vfs::FileSystem for SimpleFileSystem {
     }
 
     fn root_inode(&self) -> Arc<vfs::INode> {
-        self.get_inode(BLKN_ROOT)
-        // let root = self.get_inode(BLKN_ROOT);
-        // root.create("dev", vfs::FileType::Dir, 0);
+        // self.get_inode(BLKN_ROOT)
+        let root = self.get_inode(BLKN_ROOT);
+        root.create("dev", vfs::FileType::Dir, 0); // what's mode?
+        return root;
     }
 
     fn info(&self) -> vfs::FsInfo {