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 f38fbcf37..64166c553 100644
--- a/crates/fj-core/src/validation/checks/half_edge_connection.rs
+++ b/crates/fj-core/src/validation/checks/half_edge_connection.rs
@@ -3,7 +3,7 @@ use fj_math::{Point, Scalar};
 use crate::{
     geometry::Geometry,
     storage::Handle,
-    topology::{Cycle, Face, HalfEdge, Region, Sketch},
+    topology::{Cycle, Face, HalfEdge, Region, Sketch, Surface},
     validation::{validation_check::ValidationCheck, ValidationConfig},
 };
 
@@ -63,7 +63,7 @@ impl ValidationCheck<Face> for AdjacentHalfEdgesNotConnected {
         geometry: &'r Geometry,
         config: &'r ValidationConfig,
     ) -> impl Iterator<Item = Self> + 'r {
-        check_region(object.region(), geometry, config)
+        check_region(object.region(), object.surface(), geometry, config)
     }
 }
 
@@ -73,26 +73,27 @@ impl ValidationCheck<Sketch> for AdjacentHalfEdgesNotConnected {
         geometry: &'r Geometry,
         config: &'r ValidationConfig,
     ) -> impl Iterator<Item = Self> + 'r {
-        object
-            .regions()
-            .iter()
-            .flat_map(|region| check_region(region, geometry, config))
+        object.regions().iter().flat_map(|region| {
+            check_region(region, object.surface(), geometry, config)
+        })
     }
 }
 
 fn check_region<'r>(
     region: &'r Region,
+    surface: &'r Handle<Surface>,
     geometry: &'r Geometry,
     config: &'r ValidationConfig,
 ) -> impl Iterator<Item = AdjacentHalfEdgesNotConnected> + 'r {
     [region.exterior()]
         .into_iter()
         .chain(region.interiors())
-        .flat_map(|cycle| check_cycle(cycle, geometry, config))
+        .flat_map(|cycle| check_cycle(cycle, surface, geometry, config))
 }
 
 fn check_cycle<'r>(
     cycle: &'r Cycle,
+    _: &'r Handle<Surface>,
     geometry: &'r Geometry,
     config: &'r ValidationConfig,
 ) -> impl Iterator<Item = AdjacentHalfEdgesNotConnected> + 'r {