Russia on Thursday made fun U.S. complaints about unsafe aerial encounters between their respective aircraft, and said U.S. pilots can solve the problem by staying away from Russia’s border.

“The Aerospace Force will continue to maintain the reliable protection of Russian airspace,” the Russian Defense Ministry said in a Thursday statement carried by state-run media. “Should American pilots, knowing this fact, fall into depression or succumb to any phobias, we advise the U.S. side to exclude these flight routes near Russia’s borders in the future, or return to the negotiating table and agree on their rules.”