Coherence is a core objective in most multinational interventions and seems of particular relevance to UN peacekeeping missions with their increasing complexity and multidimensionality. Yet, coherence has rarely been studied empirically. We borrow the concept of ‘fit’ from organizational theory and use it to develop a conceptual framework to study coherence in peacekeeping operations. Fit is the degree of match between what is required by the mandate, on the one hand, and an institutional set-up and the implemented practices, on the other. We identify three relevant dimensions of fit to study coherence: strategic and organizational, cultural and human and operational fit. Our empirical material focuses on the UN mission in Mali (MINUSMA) and in particular on the interplay between the intelligence components and the rest of the mission. We draw upon a large empirical dataset containing over 120 semi-structured interviews, field observations and participation in pre-deployment exercises and evaluation sessions. Our empirical analysis suggests that low level of fit across several dimensions leads to inertial and widespread frictions in the practice of peacekeeping and could potentially undermine peacekeeping effectiveness. Building on existing scholarship on micro-level approaches to peacekeeping, we hope to further the debate on organizational dynamics within peace operations.