Abstract For many decades, scholars of gender and women's history in the Middle East and North Africa have challenged prevailing visions of an unchanged patriarchy, showing how patriarchy was transformed in relation to colonialism, and how some women struggled against it. To the contrary, this article aims to challenge our understanding of women's agency, taking Mzab as a case study. It explores the ways in which women of this Berber speaking region, inhabited by Ibadi Muslims and conquered by the French in 1882, contributed to the colonial reinforcement of male domination. Reading together works of ethnography, colonial administrative files, legal disputes, and Arabic-language newspapers, this article shows that, together with the colonial legal framework, other informal legal discourses and institutions shaped women's condition. Down the road, forms of patriarchy and notions of gender shifted.