We discuss the cohomology of
higher-dimensional shifts of finite type, and prove the following: if a d-dimensional
shift of finite type X has a rich supply of homoclinic points and a certain
specification property, then every Hölder cocycle for shift-action of ℤd on X with
values in a locally compact, second countable group with a doubly invariant metric is
Hölder-cohomologous to a homomorphism. The result is illustrated with a number
of examples.