Preheat oven to 180C (350F). Butter medium size baking dish, approximately 22 x 32 cm (9 x 13 inches).
In a medium bowl, mix the cherries and the flour. Evenly distribute the cherries in the baking dish.
Combine the oats, flour, brown sugar, baking soda, and melted butter. Crumble evenly over the cherry mixture. Bake for 30-35 minutes or until the crumble topping is golden brown.