diff --git a/src/calibre/customize/__init__.py b/src/calibre/customize/__init__.py
index 8c689b9a76..97acf9e068 100644
--- a/src/calibre/customize/__init__.py
+++ b/src/calibre/customize/__init__.py
@@ -479,13 +479,13 @@ class CatalogPlugin(Plugin):  # {{{
 
     type = _('Catalog generator')
 
-    #: CLI parser options specific to this plugin, declared as namedtuple Option:
+    #: CLI parser options specific to this plugin, declared as `namedtuple` `Option`::
     #:
-    #:   from collections import namedtuple
-    #:   Option = namedtuple('Option', 'option, default, dest, help')
-    #:   cli_options = [Option('--catalog-title', default = 'My Catalog',
-    #:   dest = 'catalog_title', help = (_('Title of generated catalog. \nDefault:') + " '" + '%default' + "'"))]
-    #:   cli_options parsed in calibre.db.cli.cmd_catalog:option_parser()
+    #:     from collections import namedtuple
+    #:     Option = namedtuple('Option', 'option, default, dest, help')
+    #:     cli_options = [Option('--catalog-title', default = 'My Catalog',
+    #:     dest = 'catalog_title', help = (_('Title of generated catalog. \nDefault:') + " '" + '%default' + "'"))]
+    #:     cli_options parsed in calibre.db.cli.cmd_catalog:option_parser()
     #:
     cli_options = []