Vulnerable populations in emergency contexts are at risk of being trafficked. Trafficking prevention and response, however, have either remained unaddressed within the humanitarian cluster system, or not been addressed in a comprehensive manner, nor been perceived, in certain instances, as a life-saving intervention. Human trafficking is a crime with serious human rights concerns and implications taking place in both ordinary times and in times of crisis. This is reflected in several reports published in 2015-2016 by UN agencies, international organizations and the Special Rapporteur on Trafficking in Persons, Especially Women and Children. These reports establish a clear link between trafficking and emergency contexts, and identify a critical gap in the humanitarian response system. To address this gap, trafficking must be embedded in the humanitarian response architecture and systematically operationalized.