diff --git a/fs/libfs.c b/fs/libfs.c
index 7d70efa..1b11563 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -20,9 +20,9 @@
 	return 0;
 }
 
-int simple_statfs(struct super_block *sb, struct kstatfs *buf)
+int simple_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
-	buf->f_type = sb->s_magic;
+	buf->f_type = dentry->d_sb->s_magic;
 	buf->f_bsize = PAGE_CACHE_SIZE;
 	buf->f_namelen = NAME_MAX;
 	return 0;