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It has been known for some time that the usual $q$-entropy $S_q^{(n)}$ cannotbe shown to converge to the continuous case. In [Phys. Rev. E 97 (2018)012104], we have shown that the discrete $q$-entropy $\widetilde{S}_q^{(n)}$converges to the continuous case when the total number of states are properlytaken into account in terms of a convergence factor. Ou and Abe [Phys. Rev. E97, (2018) 066101, arXiv:1801.03035] noted that this form of the discrete$q$-entropy does not conform to the Shannon-Khinchin expandability axiom. As areply, we note that the fulfillment or not of the expandability property by thediscrete $q$-entropy strongly depends on the origin of the convergence factor,presenting an example in which $\widetilde{S}_q^{(n)}$ is expandable.

Reply to the comment on "Route from discreteness to the continuum for the Tsallis $q$-entropy" by Congjie Ou and Sumiyoshi Abe