Aldo vs. Koch officially announced for Rio
The title bout will headline the October 13 card at Brazil's HSBC Arena.
UFC officials announced the contest earlier today.
Aldo last competed at UFC 142 at the same venue UFC 153 is expected to take place at. In front of a packed Brazilian crowd, Aldo defeated Chad Mendes via first round knockout. The victory was his third title defense as a UFC champion, though his reign of dominance in Zuffa also includes an undefeated stint in the WEC.
The Brazilian's opponent, Koch, meanwhile, has also been dominant under the Zuffa banner, losing only once, a unanimous decision loss to the aforementioned Mendes. He is currently riding a four-fight winning streak, including victories over Jonathan Brookins and Raphael Assuncao.
Check out all our UFC 153 news