Fix role name.
diff --git a/Doc/library/simplehttpserver.rst b/Doc/library/simplehttpserver.rst
index ee9f82b..a92c7c9 100644
--- a/Doc/library/simplehttpserver.rst
+++ b/Doc/library/simplehttpserver.rst
@@ -106,7 +106,7 @@
httpd.serve_forever()
The :mod:`SimpleHTTPServer` module can also be invoked directly using the
-:cmdoption:`-m` switch of the interpreter with a ``port number`` argument.
+:option:`-m` switch of the interpreter with a ``port number`` argument.
Similar to the previous example, this serves the files relative to the
current directory. ::