diff --git a/library/std/src/sync/barrier.rs b/library/std/src/sync/barrier.rs
index c2c18889dde7..6a5cc9b69f82 100644
--- a/library/std/src/sync/barrier.rs
+++ b/library/std/src/sync/barrier.rs
@@ -65,8 +65,8 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 impl Barrier {
     /// Creates a new barrier that can block a given number of threads.
     ///
-    /// A barrier will block `n`-1 threads which call [`wait()`] and then wake
-    /// up all threads at once when the `n`th thread calls [`wait()`].
+    /// A barrier will block all threads which call [`wait()`] until the `n`th thread calls [`wait()`],
+    /// and then wake up all threads at once.
     ///
     /// [`wait()`]: Barrier::wait
     ///