  Motivated by an anomaly observed in the decay of an excited state of
Beryllium by the Atomki collaboration, we study an extension of the Standard
Model with a gauged $U(1)'$ symmetry in presence of a 2-Higgs Doublet Model
structure of the Higgs sector. We show that this scenario complies with a
variety of experimental results and is able to explain the potential presence
of a resonant spin-1 gauge boson, $Z'$, with a mass of 17 MeV in the Atomki
experimental data, for appropriate choices of $U(1)'$ charges and Yukawa
interactions.
