diff --git a/src/io/split.rs b/src/io/split.rs
index fca1f23fe..46b89308a 100644
--- a/src/io/split.rs
+++ b/src/io/split.rs
@@ -11,7 +11,7 @@ pub struct ReadHalf<T> {
     handle: TaskRc<RefCell<T>>,
 }
 
-/// The readable half of an object returned from `Io::split`.
+/// The writable half of an object returned from `Io::split`.
 pub struct WriteHalf<T> {
     handle: TaskRc<RefCell<T>>,
 }