diff --git a/src/bindings.rs b/src/bindings.rs
index 8d498ab..1dd670e 100644
--- a/src/bindings.rs
+++ b/src/bindings.rs
@@ -844,6 +844,7 @@ pub mod ciarlet {
         let points = points as *mut T::Real;
         for (i, j) in element.interpolation_points()[entity_dim][entity_index]
             .data()
+            .unwrap()
             .iter()
             .enumerate()
         {
@@ -870,6 +871,7 @@ pub mod ciarlet {
         let weights = weights as *mut T;
         for (i, j) in element.interpolation_weights()[entity_dim][entity_index]
             .data()
+            .unwrap()
             .iter()
             .enumerate()
         {
diff --git a/src/ciarlet.rs b/src/ciarlet.rs
index 0a73361..3f269f4 100644
--- a/src/ciarlet.rs
+++ b/src/ciarlet.rs
@@ -446,7 +446,7 @@ where
             let mut pts = DynArray::<T::Real, 2>::from_shape(ref_pts.shape());
             for p in 0..npts {
                 for (i, c) in finv(
-                    &ref_pts.data()[ref_pts.shape()[0] * p..ref_pts.shape()[0] * (p + 1)],
+                    &ref_pts.data().unwrap()[ref_pts.shape()[0] * p..ref_pts.shape()[0] * (p + 1)],
                     f,
                 )
                 .iter()