diff --git a/tokio/src/runtime/thread_pool/idle.rs b/tokio/src/runtime/thread_pool/idle.rs
index 6e692fd8d..b77cce5f4 100644
--- a/tokio/src/runtime/thread_pool/idle.rs
+++ b/tokio/src/runtime/thread_pool/idle.rs
@@ -118,7 +118,7 @@ impl Idle {
             if sleepers[index] == worker_id {
                 sleepers.swap_remove(index);
 
-                // Update the state accordingly whle the lock is held.
+                // Update the state accordingly while the lock is held.
                 State::unpark_one(&self.state);
 
                 return;