diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index 42663ff2b53..8b5b48c59c2 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -360,6 +360,7 @@ fn index_mut(&mut self, index: I) -> &mut Self::Output {
     }
 }
 
+/// Implements comparison of arrays [lexicographically](Ord#lexicographical-comparison).
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: PartialOrd, const N: usize> PartialOrd for [T; N] {
     #[inline]