diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 98835ed..c6bc103 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -413,7 +413,7 @@
 	struct super_block *sb;
 	int err = 0;
 
-	if (inode && (inode->i_sb->s_flags & MS_RDONLY)) {
+	if (inode && sb_rdonly(inode->i_sb)) {
 		/*
 		 * It means that filesystem was remounted in read-only
 		 * mode because of error or metadata corruption. But we