36Furthermore, ensuring the real consent of the parties is one of the aims of Article 23(1) of the Brussels I Regulation (see, to that effect, judgment of 21 May 2015 in El Majdoub, C‑322/14, EU:C:2015:334, paragraph 30 and the case-law cited). That is justified by the concern to protect the weaker party to the contract by avoiding jurisdiction clauses, incorporated in a contract by one party, going unnoticed (see, to that effect, judgment of 16 March 1999 in Castelletti, C‑159/97, EU:C:1999:142, paragraph 19 and the case-law cited).