diff --git a/experiments/2024-12-09/src/topology/face.rs b/experiments/2024-12-09/src/topology/face.rs
index 9f0a687e2..0a614d152 100644
--- a/experiments/2024-12-09/src/topology/face.rs
+++ b/experiments/2024-12-09/src/topology/face.rs
@@ -8,6 +8,7 @@ use crate::{
 
 use super::Vertex;
 
+#[derive(Debug)]
 pub struct Face {
     surface: Handle<Plane>,
     vertices: Vec<Handle<Vertex>>,