diff --git a/Doc/library/asyncio-sync.rst b/Doc/library/asyncio-sync.rst
index 141733ee2c8001..6b063197fc3795 100644
--- a/Doc/library/asyncio-sync.rst
+++ b/Doc/library/asyncio-sync.rst
@@ -345,7 +345,7 @@ BoundedSemaphore
 Barrier
 =======
 
-.. class:: Barrier(parties, action=None)
+.. class:: Barrier(parties)
 
    A barrier object.  Not thread-safe.