Microsoft president Brad Smith reportedly told a U.S. Congressional committee about his firm’s concerns about Apple’s Apple Store ahead of an antitrust hearing.

News of this meeting comes via Bloomberg, which cites a single source.

As you may recall, Smith publicly complained about Apple’s illegal business practices back in June, noting that the firm was abusing its role as gatekeeper to a large percentage of its customers on mobile and the incredible fees and non-transparent rules that it imposes on app makers.

“They create a very high price per toll, in some cases 30 percent of your revenue has to go to the toll keeper,” Mr. Smith wrote at the time. “The time has come—whether we are talking about D.C. or Brussels—for a much more focused conversation about the nature of app stores, the rules that are being put in place, the prices and the tolls that are being extracted and whether there is really a justification in antitrust law for everything that has been created.”

Microsoft isn’t alone in complaining about Apple’s App Store policies, far from it. But it is the biggest voice, and so it’s not surprising that the software giant had been invited to discuss its concerns ahead of a House Judiciary Antitrust Subcommittee hearing scheduled for next week. The CEOs of Amazon, Apple, Facebook, and Google will all be present at the hearing. It’s not clear if Microsoft is attending.

Apple is also under investigation by the EU for very similar illegal business practices.