diff --git a/src/user-defined-types/exercise.md b/src/user-defined-types/exercise.md
index 3918b9a69aa..4377ceb3946 100644
--- a/src/user-defined-types/exercise.md
+++ b/src/user-defined-types/exercise.md
@@ -12,7 +12,7 @@ This exercise only requires creating and populating data structures so that
 `main` runs without errors. The next part of the course will cover getting data
 out of these structures.
 
-```rust,should_panic
+```rust,editable,should_panic
 {{#include exercise.rs:event}}
     // TODO: add required variants
 }