Mulumbu missed the weekend home defeat against Tottenham with a knee injury picked up on African Nations Cup duty with DR Congo.
But Mulumbu told a fan on Twitter, who had asked if he would available to face the Reds, that "it should be good".
Mulumbu has been training with striker Peter Odemwingie while the rest of the squad enjoy a mini-break after their recent heavy schedule.
Odemwingie is still with the Baggies after his hopes of moving to QPR were dashed on transfer deadline day.
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- Peter Odemwingie