In the photo Lewis Rubongoya, the secretary-general of Uganda's opposition party, the National Unity Platform, has his fist raised. He is wearing a hooded sweatshirt with a photo of Lt Gen Muhoozi Kainerugaba and the message "Vote Gen Muhoozi Kainerugaba" on the front.
One post, shared in a public group of over 47,000 members, reads: "Gen Muhoozi kainerugaba is a Unifying Messiah, He will Unit all Ugandans irrespective of Religion, Culture, social status or Political background, let's embrace the Patriotic Statesman."
Original photo posted by opposition secretary-general
In the original photo there is a logo of a fist and roots, not Kainerugaba's photo, on Rubongoya's hoodie.
The opposition leader posted the photo with a quote attributed to US civil rights leader Martin Luther King Jr which ends: "This is why right, temporarily defeated, is stronger than evil triumphant."
The image circulating on Facebook has been digitally altered.