Any issues substituting milk for buttermilk 1:1

Wife and kids want chicken and waffles for easter brunch. Usually, I make Belgian waffles using the box pancake mix but they kind of suck, so I was going to try a homemade batter. The recipe I got from ATK just says milk, but I will have buttermilk anyway for the fried chicken that I won't use for anything else, so I wonder if I could swap out 'milk' for 'buttermilk' without any issues? This is a recipe in total: 1 ¼ cups all-purpose flour 1 cup Rice Krispies ¾ cup cornstarch ¼ cup sugar 1 tsp baking powder ½ tsp baking soda ¾ tsp table salt 2 large eggs 1 ½ cups milk 1 tsp vanilla extract ½ cup vegetable oil submitted by /u/SirNaves9