Donald Trump made a blunder during the final presidential debate Wednesday, apparently confusing the actions of Saudi Arabia with those of ISIS.

SEE ALSO:Debate guests pretty much used as pawns in presidential election

During a heated exchange about both candidate's charitable organizations, Trump highlighted the Clinton Foundation's ties with Saudi Arabia before going on to say the country pushes gay people off buildings.

The only problem: It's actually ISIS that is known for that practice, not Saudi Arabia.

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It didn't go unnoticed on Twitter.

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Clinton incidentally let the mistake slide, but hit back at Trump's own company.

"I would be happy to compare what we do to the Trump Foundation," she said, adding that the Trump Foundation "took money from other people and bought a 6-foot portrait of Donald."

BONUS: Hillary Clinton just dropped the other p-word on Donald Trump