diff --git a/crates/polymodel-renderer-protocol/src/lib.rs b/crates/polymodel-renderer-protocol/src/lib.rs
index a4f46bb..c109f1f 100644
--- a/crates/polymodel-renderer-protocol/src/lib.rs
+++ b/crates/polymodel-renderer-protocol/src/lib.rs
@@ -1,4 +1,4 @@
-//! Leaf protocol crate for the Polymodel renderer worker split.
+//! Protocol crate for the Polymodel renderer worker split.
 //!
 //! Owns the types shared between the Dioxus main thread and the renderer Web Worker:
 //! [`MeshFormat`] / [`LengthUnit`] / [`Units`] (relocated from the mesh contract so the
diff --git a/crates/polymodel-renderer-worker/src/worker.rs b/crates/polymodel-renderer-worker/src/worker.rs
index a248468..d6e3e2f 100644
--- a/crates/polymodel-renderer-worker/src/worker.rs
+++ b/crates/polymodel-renderer-worker/src/worker.rs
@@ -594,6 +594,33 @@ mod tests {
         ));
     }
 
+    #[wasm_bindgen_test]
+    fn cancelled_compound_parse_maps_to_cancelled_load_error() {
+        let bytes = b"0 FILE root.ldr\n3 16 0 0 0 1 0 0 0 1 0 0\n";
+        let source = VerifiedCompoundSource {
+            primary: "root.ldr".into(),
+            resources: vec![polymodel_renderer_protocol::ModelResource {
+                key: "root.ldr".into(),
+                path: "root.ldr".into(),
+                root: "mpd".into(),
+                byte_length: bytes.len() as u64,
+                sha256: vec![0; 32],
+                mime_type: "application/x-ldraw".into(),
+                target_cids: Vec::new(),
+                bytes: bytes.to_vec(),
+            }],
+            source_identities: Vec::new(),
+            target_selections: Vec::new(),
+        };
+        let cancellation = CancellationPolicy::new();
+        cancellation.cancel();
+
+        assert!(matches!(
+            parse_compound_source(source, cancellation),
+            Err(CompoundLoadError::Cancelled)
+        ));
+    }
+
     #[wasm_bindgen_test]
     fn generation_allocation_never_reuses_saturated_identity() {
         assert_eq!(next_generation(0), Ok(1));