The Senegal star made a strong start to his Bayern Munich career after moving from Liverpool in June but has now gone five games without a goal.
The German champions, looking to play without a main striker after the exit of Robert Lewandowski, have not won in four Bundesliga games.
“Sadio still needs a little time, he has to get used to the Bundesliga.
But he will,” Salihamidzic said on Wednesday.
“I know how it is as the new player in a team, in another country, in another city, in another football culture.
“Sadio is going through this process.
Soon he will trust himself more and we will see that on the pitch.
“I’m not the biggest fan of January transfers because I complete my planning for the season in the summer window.
But of course we will closely follow the World Cup,” he said.
“I don’t believe there will be any huge transfers.