diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c1b02c3..aeb6d22 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4484,6 +4484,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 		iput(root);
 		goto failed_mount4;
 	}
+
+#ifdef CONFIG_UNICODE
+	if (sbi->s_encoding)
+		sb->s_d_op = &ext4_dentry_ops;
+#endif
+
 	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		ext4_msg(sb, KERN_ERR, "get root dentry failed");