Benteke suffered a hip injury playing for his Premier League side Aston Villa on Sept. 21 and was initially ruled out for between four and six weeks.
However, the Belgian FA's medical team visited Birmingham earlier this week and said the injury appeared to be healing faster than expected.
Belgium top Group A with 22 points and a draw in Zagreb against second-placed Croatia on Friday Oct. 11 will guarantee the Belgians a place in the finals for the first time in 12 years.
Even if they lose, they would still secure an automatic place with victory at home against Wales four days later.
Defenders: Toby Alderweireld (Atletico Madrid), Laurent Ciman (Standard Liege), Guillaume Gillet (Anderlecht), Vincent Kompany (Manchester City), Nicolas Lombaerts (Zenit St Petersburg), Sebastien Pocognoli (Hannover 96), Daniel Van Buyten (Bayern Munich), Thomas Vermaelen (Arsenal), Jan Vertonghen (Tottenham Hotspur)
Midfielders: Nacer Chadli (Tottenham Hotspur), Steven Defour (Porto), Moussa Dembele (Tottenham Hotspur), Marouane Fellaini (Manchester United), Timmy Simons (Club Bruges), Axel Witsel (Zenit St Petersburg)