Fifa has awarded Niger a 3-0 win in a 2014 World Cup qualifier because Gabon fielded an ineligible player.
Football's world governing body ruled Charly Moussono was ineligible because he represented Cameroon at the 2006 Beach Soccer World Cup.
As a consequence Fifa overturned the original 0-0 result from the match, which was played in Niamey in June.
And Fifa confirmed on Wednesday its decision would stand after Gabon failed to file a proper appeal.
Congo now head the group with four points from two matches. Gabon and Niger have three points and bottom-placed Burkina Faso have one.
Moussono also played four matches when technically ineligible at the 2012 African Cup of Nations as co-host Gabon reached the quarter-finals.
But the Confederation of African Football has not overturned those results.