diff --git a/crates/fj-core/src/operations/sweep/region.rs b/crates/fj-core/src/operations/sweep/region.rs
index 0e65445b7..b8adb0b9d 100644
--- a/crates/fj-core/src/operations/sweep/region.rs
+++ b/crates/fj-core/src/operations/sweep/region.rs
@@ -2,7 +2,6 @@ use fj_interop::Color;
 use fj_math::Vector;
 
 use crate::{
-    geometry::SurfaceGeometry,
     operations::{
         insert::Insert, reverse::Reverse, transform::TransformObject,
     },
@@ -55,7 +54,7 @@ impl SweepRegion for Region {
 
         let top_exterior = sweep_cycle(
             self.exterior(),
-            &core.layers.geometry.of_surface(&surface),
+            surface.clone(),
             color,
             &mut faces,
             path,
@@ -69,7 +68,7 @@ impl SweepRegion for Region {
             .map(|bottom_cycle| {
                 sweep_cycle(
                     bottom_cycle,
-                    &core.layers.geometry.of_surface(&surface),
+                    surface.clone(),
                     color,
                     &mut faces,
                     path,
@@ -96,7 +95,7 @@ impl SweepRegion for Region {
 
 fn sweep_cycle(
     bottom_cycle: &Cycle,
-    bottom_surface: &SurfaceGeometry,
+    bottom_surface: Handle<Surface>,
     color: Option<Color>,
     faces: &mut Vec<Face>,
     path: Vector<3>,
@@ -104,7 +103,7 @@ fn sweep_cycle(
     core: &mut Core,
 ) -> Handle<Cycle> {
     let swept_cycle = bottom_cycle.reverse(core).sweep_cycle(
-        bottom_surface,
+        &core.layers.geometry.of_surface(&bottom_surface),
         color,
         path,
         cache,