diff --git a/Doc/library/grp.rst b/Doc/library/grp.rst
index fbfb922d3e0528ee4723d047910f696e67e05351..baa31752a2c750c73d7b0e8c79263fdd05a8c851 100644
--- a/Doc/library/grp.rst
+++ b/Doc/library/grp.rst
@@ -38,7 +38,7 @@ accessible via :func:`getgrnam` or :func:`getgrgid`.)
 It defines the following items:
 
 
-.. function:: getgrgid(gid)
+.. function:: getgrgid(id)
 
    Return the group database entry for the given numeric group ID. :exc:`KeyError`
    is raised if the entry asked for cannot be found.