diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs
index 7b84b54b882..b85921f31de 100644
--- a/tokio/src/lib.rs
+++ b/tokio/src/lib.rs
@@ -284,7 +284,7 @@
 //!             loop {
 //!                 let n = match socket.read(&mut buf).await {
 //!                     // socket closed
-//!                     Ok(n) if n == 0 => return,
+//!                     Ok(0) => return,
 //!                     Ok(n) => n,
 //!                     Err(e) => {
 //!                         eprintln!("failed to read from socket; err = {:?}", e);