diff --git a/plate-tool-lib/src/csv/auto.rs b/plate-tool-lib/src/csv/auto.rs
index 232edad..8a0d935 100644
--- a/plate-tool-lib/src/csv/auto.rs
+++ b/plate-tool-lib/src/csv/auto.rs
@@ -13,6 +13,7 @@ use crate::transfer_region::{CustomRegion, Region, TransferRegion};
 
 use std::collections::{HashSet, HashMap};
 
+#[derive(Debug)]
 pub struct AutoOutput {
     pub sources: Vec<PlateInstance>,
     pub destinations: Vec<PlateInstance>,