Preheat oven to 350°.
Peel and slice peaches into chunks.
Mix chunks of peaches with blueberries with 1/2 c. flour, 1/4 c. sugar and salt.
Grate the butter and mix in a bowl with flour, brown sugar, cinnamon and oatmeal.
Put the fruit mixture in a greased 8 x 8 pan.
Sprinkle on the oatmeal crust and pat down into the fruit.
Bake for 40 minutes. Serve with ice cream or pour some heavy cream on top.