The match was a warm-up encounter between the two sides as they seek a spot in the final round battle for the Rio 2016 games.
The Senegalese took a 2-0 lead before going to halftime but the Algerians reduced the score-line through a penalty converted by Zakaria Hadouche late in the game.
Algeria who were exempted from the first two rounds of the championship playoffs will face Sierra Leone in the first leg on July 19 at 20:00 at the Mustapha Tchaker stadium of Blida, while the return meeting is scheduled for July 25, 2015 at 20:00, also at the Tchaker Blida.
The final phase of the African championship U-23 Nations will take place from 5 to 19 December in Senegal. The first three will represent the continent at the Olympic Games-2016 Olympics in Rio de Janeiro.