What's the reflective coefficient and phase when an incident wave hits a PMC?

Who can tell me~ If a incident wave normally hits a perfect magnetic conductor, what's reflective coefficient and phase?The reflection is +1?

From Current Image Theory, the reflection coefficient is +1 (magnitude = 1, phase = 0o), contrary to the same case with a PEC surface, which has a reflection coefficient of -1 (magnitude = 1, phase = 180o).