diff --git a/crates/fj-core/src/operations/reverse/face.rs b/crates/fj-core/src/operations/reverse/face.rs
index 0a429ed89..eb6e887f0 100644
--- a/crates/fj-core/src/operations/reverse/face.rs
+++ b/crates/fj-core/src/operations/reverse/face.rs
@@ -1,4 +1,4 @@
-use std::borrow::Borrow;
+use std::{borrow::Borrow, ops::Deref};
 
 use crate::{
     operations::{
@@ -49,8 +49,7 @@ impl ReverseCurveCoordinateSystems for &Face {
         self,
         core: &mut Core,
     ) -> Self::Reversed {
-        let region = self
-            .region()
+        let region = (self.region().deref(), self.surface())
             .reverse_curve_coordinate_systems(core)
             .insert(core)
             .derive_from(self.region(), core);
diff --git a/crates/fj-core/src/operations/reverse/region.rs b/crates/fj-core/src/operations/reverse/region.rs
index d0be7d95a..9ee57838c 100644
--- a/crates/fj-core/src/operations/reverse/region.rs
+++ b/crates/fj-core/src/operations/reverse/region.rs
@@ -1,6 +1,7 @@
 use crate::{
     operations::{derive::DeriveFrom, insert::Insert},
-    topology::Region,
+    storage::Handle,
+    topology::{Region, Surface},
     Core,
 };
 
@@ -21,14 +22,14 @@ impl Reverse for Region {
     }
 }
 
-impl ReverseCurveCoordinateSystems for &Region {
+impl ReverseCurveCoordinateSystems for (&Region, &Handle<Surface>) {
     type Reversed = Region;
 
     fn reverse_curve_coordinate_systems(
         self,
         core: &mut Core,
     ) -> Self::Reversed {
-        let region = self;
+        let (region, _) = self;
 
         let exterior = region
             .exterior()