An inflatable restraint assembly includes a curtain airbag module and a ramp assembly. The curtain airbag module has an inflatable curtain portion that is disposed in a stowed configuration prior to deployment and moves to a deployed configuration subsequent to deployment. The ramp assembly is located adjacent to the inflatable curtain portion of the curtain airbag module. The ramp assembly has a pivoting portion that is moveable from a closed position to an open position in response to deployment of the inflatable curtain portion, at least one separable retainer member that retains the pivoting portion in the closed position prior to deployment of the inflatable curtain portion, and a biasing structure that biases the pivoting portion of the ramp assembly toward the open position. The pivoting portion is configured to guide the inflatable curtain portion of the curtain airbag module during deployment of the inflatable curtain portion.