  In this note we prove the existence of radially symmetric solutions for a
class of fractional Schr\"odinger equation in (\mathbb{R}^N) of the form
{equation*}
  \slap u + V(x) u = g(u), {equation*} where the nonlinearity $g$ does not
satisfy the usual Ambrosetti-Rabinowitz condition. Our approach is variational
in nature, and leans on a Pohozaev identity for the fractional laplacian.
