diff --git a/crates/fj-kernel/src/objects/mod.rs b/crates/fj-kernel/src/objects/mod.rs
index dba16edd5..bdba01e72 100644
--- a/crates/fj-kernel/src/objects/mod.rs
+++ b/crates/fj-kernel/src/objects/mod.rs
@@ -103,8 +103,8 @@ use crate::{
     path::GlobalPath,
     storage::{Handle, Store},
     validate::{
-        HalfEdgeValidationError, SurfaceVertexValidationError, Validate2,
-        VertexValidationError,
+        CycleValidationError, HalfEdgeValidationError,
+        SurfaceVertexValidationError, Validate2, VertexValidationError,
     },
 };
 
@@ -187,7 +187,10 @@ pub struct Cycles {
 
 impl Cycles {
     /// Insert a [`Cycle`] into the store
-    pub fn insert(&self, cycle: Cycle) -> Result<Handle<Cycle>, Infallible> {
+    pub fn insert(
+        &self,
+        cycle: Cycle,
+    ) -> Result<Handle<Cycle>, CycleValidationError> {
         cycle.validate()?;
         Ok(self.store.insert(cycle))
     }
diff --git a/crates/fj-kernel/src/validate/cycle.rs b/crates/fj-kernel/src/validate/cycle.rs
index 57eb8b348..83ce06b68 100644
--- a/crates/fj-kernel/src/validate/cycle.rs
+++ b/crates/fj-kernel/src/validate/cycle.rs
@@ -1,11 +1,9 @@
-use std::convert::Infallible;
-
 use crate::objects::Cycle;
 
 use super::{Validate2, ValidationConfig};
 
 impl Validate2 for Cycle {
-    type Error = Infallible;
+    type Error = CycleValidationError;
 
     fn validate_with_config(
         &self,
@@ -14,3 +12,7 @@ impl Validate2 for Cycle {
         Ok(())
     }
 }
+
+/// [`Cycle`] validation error
+#[derive(Debug, thiserror::Error)]
+pub enum CycleValidationError {}
diff --git a/crates/fj-kernel/src/validate/mod.rs b/crates/fj-kernel/src/validate/mod.rs
index 32abea1c3..5d73d839f 100644
--- a/crates/fj-kernel/src/validate/mod.rs
+++ b/crates/fj-kernel/src/validate/mod.rs
@@ -26,6 +26,7 @@ mod uniqueness;
 mod vertex;
 
 pub use self::{
+    cycle::CycleValidationError,
     edge::HalfEdgeValidationError,
     uniqueness::UniquenessIssues,
     vertex::{SurfaceVertexValidationError, VertexValidationError},
@@ -177,6 +178,10 @@ pub enum ValidationError {
     #[error("Uniqueness validation failed")]
     Uniqueness(#[from] UniquenessIssues),
 
+    /// `Cycle` validation error
+    #[error(transparent)]
+    Cycle(#[from] CycleValidationError),
+
     /// `HalfEdge` validation error
     #[error(transparent)]
     HalfEdge(#[from] HalfEdgeValidationError),