The former England captain moved to the Parc des Princes on deadline day in the January transfer window, but is yet to feature for the side.
However, coach Carlo Ancelotti has seemingly been convinced of his fitness after the veteran spent the last few weeks training with the Ligue 1 leaders, and has made him part of the group who will face OM.
A host of PSG's stars are set to line up alongside him in Le Classique, including Zlatan Ibrahimovic, Javier Pastore, Ezequiel Lavezzi and Lucas Moura.
However, Thiago Motta and Thiago Silva have lost their battles to be fit in time for Sunday's clash, and will be forced to sit out the encounter.
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