diff --git a/crates/fj-core/src/validation/checks/half_edge_connection.rs b/crates/fj-core/src/validation/checks/half_edge_connection.rs
index 376cdf1e0..6dcabad65 100644
--- a/crates/fj-core/src/validation/checks/half_edge_connection.rs
+++ b/crates/fj-core/src/validation/checks/half_edge_connection.rs
@@ -99,7 +99,12 @@ fn check_cycle<'r>(
 ) -> impl Iterator<Item = AdjacentHalfEdgesNotConnected> + 'r {
     cycle.half_edges().pairs().filter_map(|(first, second)| {
         let end_pos_of_first_half_edge = {
-            let [_, end] = geometry.of_half_edge(first).boundary.inner;
+            let end = geometry
+                .of_vertex(second.start_vertex())
+                .unwrap()
+                .local_on(first.curve())
+                .unwrap()
+                .position;
             geometry
                 .of_curve(first.curve())
                 .unwrap()