Striker Anwar Ntege scored the only goal of the game as BUL FC beat Onduparaka FC 1-0 on Tuesday.
Ntege netted with three minutes to halftime in a game that was played at the Green Light Stadium in Arua.
In an effort for an instant reply, the hosts made two quick substitutions at the start of the second half, sending on Joel Jangeyambe and Oscar Agaba but the move would not pay any dividends as BUL held on to a famous victory.
This was the first win by an away side in this fixture since it was first played in 2016.
The three points elevate BUL to 10th spot with 13 points so far this campaign.
For Onduparaka who have now lost all their last three games, they drop to 8th with 15 points from 15 games.
In their next fixtures, Onduparaka are away to Bright Stars FC on Saturday while BUL hosts Wakiso Giants FC on the same day.
How both teams started
Opoka Agustin (GK), Adriko Gasper, Magombe Hakim, Tusaba Najib, Yakubu Ramadan, Gibson Adinho, Kabon Living, Ochen Derrick, Kyeline Med Mohammed, Okech Emmanuel, Okocha Rashid.
Abdul Kimera (GK), Aggrey Madoi, Fredrick Kigozi, Ramadan Dudu, Walter Ochora, Godfrey Akol, Elvis Kibaale, Robert Mukongotya, Richard Wandyaka, Simon Oketch Peter, Anwar Ntege.
The other games played on Tuesday
-Busoga United FC 0-4 KCCA FC
-Kitara FC 0-1 Express FC
-UPDF FC 0-1 URA FC
-Wakiso Giants FC 2-2 MYDA FC
-Kyetume FC 0-1 SC Villa