Elabdellaoui signed for Feyenoord last week on a season-long loan.
"In view of our busy schedule for this season, we require a deep squad. Plus, we can use Omar very well. He is a player with great talent, who is excellent in different positions.
"Omar is technically proficient, mentally very strong and a hard worker. We are convinced that he fits in very well at Feyenoord."