diff --git a/sub/core/src/ctuple.rs b/sub/core/src/ctuple.rs
index a285f02..2172748 100644
--- a/sub/core/src/ctuple.rs
+++ b/sub/core/src/ctuple.rs
@@ -1,3 +1,4 @@
+use core::fmt::{Debug, Formatter};
 
 pub trait Tuple2CTuple {
     type CTuple;
@@ -8,6 +9,7 @@ macro_rules! define_tuple {
     ($struct_name:ident, $module_name:ident, $($T:ident),*) => {
         pub mod $module_name {
             #[repr(C)]
+            #[derive(Debug, Clone, Default)]
             pub struct $struct_name<$($T),*>($(pub $T),*);
 
             impl<$($T),*> super::Tuple2CTuple for ($($T,)*) {