  The bowshocks of runaway stars had been theoretically proposed as gamma-ray
sources. However, this hypothesis has not been confirmed by observations up to
date. In this paper, we present two runaway stars (Lambda Cephei and LS 2355)
whose bowshocks are coincident with the unidentified Fermi gamma-ray sources
3FLG J2210.1+5925 and 3FGL J1128.7-6232, respectively. After performing a
cross-correlation between different catalogues at distinct wavelengths, we
found that these bowshocks are the most peculiar objects in the Fermi position
ellipses. Then, we computed the inverse Compton emission and fitted the Fermi
data in order to test the viability of both runaway stars as potential
counterparts of the two high-energy sources. We obtained very reasonable values
for the fitted parameters of both stars. We also evaluated the possibility for
the source 3FGL J1128.7-6232, which is positionally coincident with an HII
region, to be the result of background cosmic-rays protons interacting with the
matter of the cloud, as well as the probability of a pure chance association.
We conclude that the gamma rays from these Fermi sources might be produced in
the bowshocks of the considered runaway stars. In such a case, these would be
the first sources of this class ever detected at gamma rays.
