diff --git a/experiments/2025-03-18/src/geometry/curve.rs b/experiments/2025-03-18/src/geometry/curve.rs
index 244b63865..f2e45773c 100644
--- a/experiments/2025-03-18/src/geometry/curve.rs
+++ b/experiments/2025-03-18/src/geometry/curve.rs
@@ -141,7 +141,7 @@ impl CurveGeometry for (Point<3>, fj_math::Circle<3>) {
     ) -> Vec<Point<1>> {
         let (_, circle) = self;
 
-        CircleApproxParams::new(circle, tolerance)
+        CircleApproxParams::new(circle.radius(), tolerance)
             .approx_circle(boundary)
             .collect()
     }