Passcatcher allowed a step?

[duketownie]

The situation: A fastbreak. An offensive player who's running hard upcourt catches the outlet pass in the midcourt area. However, a defender plants herself in the area where the offensive player will take her first step after catching the pass. So, of course, the offensive player, whose head is naturally turned back downcourt in order to catch the pass, crashes into the planted defender after making the catch and either travelling or, worse, a charge is called on the offensive player.

Correct call? Or should it be a blocking foul on the defender for not giving the offensive player a fair chance to avoid contact (like a step and a half)?