The paper analyzes the ontological function of language as articulated in Ernesto Laclau´s social theory. Firstly, Laclau´s argument on the role of the ideological interpellation will be reconstructed, secondly, I will be demonstrated that isolated agency of ideological performativity is not sufficient to introduce a coherent ontological consistency of identity. It will be argued that the intertwine of libidinal force with naming, as the recent developments of this approach suggests, provides the sufficient conditions of the possibility of generating collective identities.