The BVB boss admitted that speculation about his players was normal, but said that he was unhappy about reports suggesting the club had agreed a fee with Barcelona.
"I'm sure that Hummels has a lot of admirers, but spreading the rumour that we've agreed a price, now that annoys me," Klopp told reporters.
"There was no need, especially when it's not true. Speculation is normal in football, that doesn't bother me.
"Interest in our players is a good sign. That's not the issue here."
Dortmund are currently second in the Bundesliga.