Ghana striker Abdul Majeed Waris scored his 13th Swedish top flight league goal on Monday as Hacken beat GAIS 3-1.
The 20-year-old was fouled inside the box on 87 minutes and Michael Ericsson stepped up to put it away to give Hacken a 2-1 lead.
Waris then sealed the points for Hacken with a fine effort in the 98th minute to help Peter Gerhardsson's side to their ninth victory of the campaign.
He raced into the box and fired past the visitor's goalkeeper to send the home fans into a jubilant mood.
Waris has been invited for Ghana's international friendly against China in Beijing on August 15.
He leads the scorers chart in the Swedish Allsvenskan.