On the dual of bent functions with 2r Niho exponents

Computed is the dual of the Niho bent function consisting of 2
^r
exponents that was found by Leander and Kholosha. The algebraic degree of the dual is calculated and it is shown that this new bent function is not of the Niho type. This note is a follow-up of the recent paper by Carlet and Mesnager.