diff --git a/Doc/c-api/arg.rst b/Doc/c-api/arg.rst
index 5ceab58..1ea9e9a 100644
--- a/Doc/c-api/arg.rst
+++ b/Doc/c-api/arg.rst
@@ -57,6 +57,7 @@
 
 ``z*`` (string or ``None`` or any buffer compatible object) [Py_buffer*]
    This is to ``s*`` as ``z`` is to ``s``.
+
   .. versionadded:: 2.6
 
 ``u`` (Unicode object) [Py_UNICODE \*]