diff --git a/output/src/out_structs.rs b/output/src/out_structs.rs
index 8191b3e..a68771a 100644
--- a/output/src/out_structs.rs
+++ b/output/src/out_structs.rs
@@ -6,7 +6,7 @@ use crate::*;
 /// let xy: XY<u16> = XY(0, 0);
 /// ```
 #[cfg_attr(test, derive(Arbitrary))]
-#[derive(Copy, Clone, Default)] pub struct XY<C: Coord>(pub C, pub C);
+#[derive(Copy, Clone, Debug, Default)] pub struct XY<C: Coord>(pub C, pub C);
 
 /// A size (Width, Height).
 ///
@@ -14,7 +14,7 @@ use crate::*;
 /// let wh: WH<u16> = WH(0, 0);
 /// ```
 #[cfg_attr(test, derive(Arbitrary))]
-#[derive(Copy, Clone, Default)] pub struct WH<C: Coord>(pub C, pub C);
+#[derive(Copy, Clone, Debug, Default)] pub struct WH<C: Coord>(pub C, pub C);
 
 /// Point with size.
 ///
@@ -25,7 +25,7 @@ use crate::*;
 /// * [ ] TODO: anchor field (determines at which corner/side is X0 Y0)
 ///
 #[cfg_attr(test, derive(Arbitrary))]
-#[derive(Copy, Clone, Default)] pub struct XYWH<C: Coord>(pub C, pub C, pub C, pub C);
+#[derive(Copy, Clone, Debug, Default)] pub struct XYWH<C: Coord>(pub C, pub C, pub C, pub C);
 
 /// A cardinal direction.
 ///