Risk management is today a major steering tool for any organization wanting to deal with Information System (IS) security. However, IS Security Risk Management (ISSRM) remains difficult to establish and maintain, mainly in a context of multi-regulations with complex and inter-connected IS. We claim that a connection with Enterprise Architecture Management (EAM) contributes to deal with these issues. According to our research agenda, a first step towards a better integration of both domains is to define an EAM-ISSRM conceptual integrated model. To build such a model, we will improve the ISSRM domain model, a conceptual model depicting the domain of ISSRM, with the concepts of EAM. The contribution of this paper is focused on the improvement of the ISSRM domain model with the concepts of TOGAF, a well-known EAM standard.