diff --git a/Doc/library/zlib.rst b/Doc/library/zlib.rst
index 4fd44eec38f..9f8eb26b97f 100644
--- a/Doc/library/zlib.rst
+++ b/Doc/library/zlib.rst
@@ -228,8 +228,6 @@ the following constants:
    This may be different from the zlib library actually used at runtime, which
    is available as :const:`ZLIB_RUNTIME_VERSION`.
 
-   .. versionadded:: 3.3
-
 
 .. data:: ZLIB_RUNTIME_VERSION