'Sphinx math command in docstring is unknown?

Example:

*{X}_{Q} -> {\round(t/Q*X)}_t
* {Q} = {q_1,...,q_l}
* {P} = {p_1,...,p_k}

causes me to get warning: Found unknown command '\round'

My conf.py is the following.

Note: I'm using autodoxygen from Breathe



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