PTI candidate Ahmed Khan Bhachar was declared the winner from PP-87 Mianwali a day before the by-election.
Returning officer Shahid Islam announced his victory.
Earlier, PML-N candidate Ali Haider Noor boycotted the election and withdrew his nomination papers. The PPP’s Khalid Awan and independent candidate Mohammad Rafi also withdrew their papers.
The election for PP-87 was postponed due to the death of candidate Ahmed Khan Hazare Khel.