diff --git a/library/core/src/slice/index.rs b/library/core/src/slice/index.rs
index 68de4e4e1f32a..fd7ecf3daf316 100644
--- a/library/core/src/slice/index.rs
+++ b/library/core/src/slice/index.rs
@@ -138,7 +138,7 @@ mod private_slice_index {
 /// A helper trait used for indexing operations.
 ///
 /// Implementations of this trait have to promise that if the argument
-/// to `get_(mut_)unchecked` is a safe reference, then so is the result.
+/// to `get_unchecked(_mut)` is a safe reference, then so is the result.
 #[stable(feature = "slice_get_slice", since = "1.28.0")]
 #[rustc_diagnostic_item = "SliceIndex"]
 #[rustc_on_unimplemented(