diff --git a/config/linkcheckerrc b/config/linkcheckerrc
index 83e11fe0..767556c6 100644
--- a/config/linkcheckerrc
+++ b/config/linkcheckerrc
@@ -212,15 +212,17 @@
 #  ^https?://www\.example\.com/~calvin/ calvin mypass
 #  ^ftp://www\.example\.com/secret/ calvin
 
-# if the website requires a login the URL and optionally the user and
-# password CGI fieldnames can be provided.
+# if the website requires a login via a page with an HTML form the URL of the
+# page and optionally the username and password input element name attributes
+# can be provided.
 #loginurl=http://www.example.com/
 
-# The name of the user and password CGI field
+# The name attributes of the username and password HTML input elements
 #loginuserfield=login
 #loginpasswordfield=password
-# Optionally any additional CGI name/value pairs. Note that the default
-# values are submitted automatically.
+# Optionally the name attributes of any additional input elements and the values
+# to populate them with. Note that these are submitted without checking
+# whether matching input elements exist in the HTML form.
 #loginextrafields=
 #  name1:value1
 #  name 2:value 2