diff --git a/crates/fj-kernel/src/objects/cycle.rs b/crates/fj-kernel/src/objects/cycle.rs
index 4fe091a56..568253b94 100644
--- a/crates/fj-kernel/src/objects/cycle.rs
+++ b/crates/fj-kernel/src/objects/cycle.rs
@@ -18,6 +18,8 @@ impl Cycle {
     ///
     /// # Panics
     ///
+    /// Panics, if `half_edges` does not yield at least one half-edge.
+    ///
     /// Panic, if the end of each half-edge does not connect to the beginning of
     /// the next one.
     pub fn new(half_edges: impl IntoIterator<Item = Handle<HalfEdge>>) -> Self {