diff --git a/burn-book/src/basic-workflow/data.md b/burn-book/src/basic-workflow/data.md
index 91ff8c317c..53446d2a24 100644
--- a/burn-book/src/basic-workflow/data.md
+++ b/burn-book/src/basic-workflow/data.md
@@ -20,6 +20,7 @@ use burn::{
     prelude::*,
 };
 
+#[derive(Clone)]
 pub struct MnistBatcher<B: Backend> {
     device: B::Device,
 }