diff --git a/futures-util/src/io/window.rs b/futures-util/src/io/window.rs
index 77b7267c6..d85728238 100644
--- a/futures-util/src/io/window.rs
+++ b/futures-util/src/io/window.rs
@@ -1,6 +1,6 @@
 use std::ops::{Bound, Range, RangeBounds};
 
-/// A owned window around an underlying buffer.
+/// An owned window around an underlying buffer.
 ///
 /// Normally slices work great for considering sub-portions of a buffer, but
 /// unfortunately a slice is a *borrowed* type in Rust which has an associated