diff --git a/src/stacked_borrows/stack.rs b/src/stacked_borrows/stack.rs
index 1c3ee0fd57..ccdd85eafd 100644
--- a/src/stacked_borrows/stack.rs
+++ b/src/stacked_borrows/stack.rs
@@ -45,7 +45,6 @@ pub struct Stack {
 /// It may seem like maintaining this cache is a waste for small stacks, but
 /// (a) iterating over small fixed-size arrays is super fast, and (b) empirically this helps *a lot*,
 /// probably because runtime is dominated by large stacks.
-/// arrays is super fast
 #[cfg(feature = "stack-cache")]
 #[derive(Clone, Debug)]
 struct StackCache {