In stochastic games with stage duration h, players act at times h, 2h, 3h, ..., and the payoff and leaving probabilities are proportional to h. When h tends to 0, such games approximate games in continuous time. The behavior of the values when h tends to 0 was already studied in the case of stochastic games with perfect observation of the state. We consider the same question for the case of state-blind stochastic games. Our main result states that the value of any state-blind stochastic game with stage duration h converges as h tends to 0 to a unique viscosity solution of a partial differential equation.