It was only the second victory for the eight-time domestic league champion. After six rounds, Fanja is placed fifth on the table.
The league takes a break now with the next round of matches scheduled for November 22 as the national team will assemble to prepare for the a FIFA World Cup qualifier against Turkmenistan in Ashgabat on November 17.
Prior to the Group D matchup, Oman hosts New Zealand in a friendly at the Seeb Sports Stadium on November 12. Hosni's return to form will be welcomed by national team coach Paul Le Guen after the striker failed to find a goal in the last three World Cup qualifiers against Guam (0-0), Iran (1-1) and India (3-0).
Hosni was on target in the opener against India (2-1) and had found the net against Turmenistan at home, which Oman won 3-1.
Meanwhile, Sohar stayed on top of the OPL table with a 4-2 win over Muscat to total 12 points from six matches. Suwaiq has same number of points, but trails on goal-difference.
Defending champion Al Arouba, which routed Dhofar 6-2 on October 23, was jolted as it lost 1-4 to Al Khabourah to slip to third place with 11 points.
Dhofar edged past Al Musannah 2-1 to take the fourth place with 11 points. Fanja is tied with Musannah with ten points, with the former ahead on goal-difference.
Other results (sixth round): Saham 0 Sur 0, Al Nasr 0 Al Nahda 0, Suwaiq 1 Salalah 0.