Egypt's ultraconservative Islamist Nour Party is considering taking legal action against the government after an amended school curriculum incorporated what it called "libel" against the group.

An amended version of a secondary school history book included a section attacking the party and other Islamist groups and claiming their foundation was unconstitutional.

"Islamist groups came to the fore and portrayed themselves as the orchestrators of the revolution. Allowing them to form political parties like [the Muslim Brotherhood's] Freedom and Justice Party and the Nour Party assisted their rise, even though it breached the constitution," reads a passage which covers the developments of the 2011 revolution.

Nour officials say the addition was both incorrect and irrelevant to an educational school curriculum.

"The book says the party was established in ‘breach of the constitution;’ that's the first piece of historically inaccurate information," Nader Bakkar, aid to the Nour Party head, told Ahram Online.

The Nour Party was created following the 2011 uprising under an interim constitutional declaration during the rule of the Supreme Council of the Armed Forces (SCAF) which presided over Egypt for 17 months.

The second biggest Islamist party after the Muslim Brotherhood, the Nour Party refused to take part in the massive protests that culminated in the ouster of Islamist president Mohamed Morsi last summer. Later however, the group backed then-army chief Abdel-Fattah El-Sisi’s presidential bid.

Slamming the move as "libel," Bakkar blasted what he deemed as blurring “political disputes" with education and stirring prejudice among new generations.

He also questioned the modification process and the credibility of curricula amended by the current education ministry, arguing that writing history should be done over long years until a wide vision of events has fully developed.

Bakkar said the group, which voiced its complaint to the ministry, is mulling resorting to judiciary recourse should the curriculum not modified.

The Nour Party says it has been informed that the ministry has formed a committee to look into its complaints.