diff --git a/crates/fj-core/src/geometry/boundary/multiple.rs b/crates/fj-core/src/geometry/boundary/multiple.rs
index d922fd970..2febc6714 100644
--- a/crates/fj-core/src/geometry/boundary/multiple.rs
+++ b/crates/fj-core/src/geometry/boundary/multiple.rs
@@ -10,8 +10,7 @@ use crate::geometry::CurveBoundary;
 /// boundary.
 #[derive(Clone, Debug, Eq, PartialEq, Hash, Ord, PartialOrd)]
 pub struct CurveBoundaries<T: CurveBoundariesPayload = ()> {
-    /// The [`CurveBoundary`] instances
-    pub inner: Vec<(CurveBoundary<Point<1>>, T)>,
+    inner: Vec<(CurveBoundary<Point<1>>, T)>,
 }
 
 impl<T: CurveBoundariesPayload> CurveBoundaries<T> {