diff --git a/en/src/functional-programing/iterator.md b/en/src/functional-programing/iterator.md
index 95b6b7f..138ad19 100644
--- a/en/src/functional-programing/iterator.md
+++ b/en/src/functional-programing/iterator.md
@@ -287,7 +287,7 @@ fn main() {
 
 11. 🌟🌟
 
-```rust
+```rust,editable
 /* Fill in the blanks */
 use std::collections::HashMap;
 fn main() {