diff --git a/tokio/tests/async_send_sync.rs b/tokio/tests/async_send_sync.rs
index 2ef02c7e8..e46d5c85a 100644
--- a/tokio/tests/async_send_sync.rs
+++ b/tokio/tests/async_send_sync.rs
@@ -136,7 +136,7 @@ macro_rules! cfg_not_wasi {
     }
 }
 
-// Manualy re-implementation of `async_assert_fn` for `poll_fn`. The macro
+// Manually re-implementation of `async_assert_fn` for `poll_fn`. The macro
 // doesn't work for this particular case because constructing the closure
 // is too complicated.
 const _: fn() = || {