Haga, who sustained the injury at Cadwell Park, rode regardless at Donington last time out and is determined to improve on his showing there when the British Superbike championship heads to mainland Europe for the first time.
"I still have pain with my collarbone and there is not much time between the races now but I will do my best for the races," said Haga, who missed out on the top six at the Leicestershire track.
"I am disappointed about my results at Cadwell Park and Donington Park because of my injury but I am always trying to do the best I can. I am always trying to get podium finishes.
"Assen is one of my favourite tracks and it is also a very difficult track too; I think it is good to go and race there."