diff --git a/rtiow/src/aabb.rs b/rtiow/src/aabb.rs
index 98b8c9f..599da88 100644
--- a/rtiow/src/aabb.rs
+++ b/rtiow/src/aabb.rs
@@ -89,6 +89,7 @@ impl AABB {
     }
 
     pub fn hit_precompute(&self, r: Ray, t0: f32, t1: f32) -> bool {
+        // TODO(wathiede): this has bugs.
         let mut t_min = (self.bounds[r.sign[0]].x - r.origin.x) * r.inv_direction.x;
         let mut t_max = (self.bounds[1 - r.sign[0]].x - r.origin.x) * r.inv_direction.x;
         let t_y_min = (self.bounds[r.sign[0]].y - r.origin.y) * r.inv_direction.y;