diff --git a/doc/help/configuring.asciidoc b/doc/help/configuring.asciidoc
index f780b32ea..a3991f023 100644
--- a/doc/help/configuring.asciidoc
+++ b/doc/help/configuring.asciidoc
@@ -77,7 +77,7 @@ accepted values depend on the type of the option. Commonly used are:
 - Booleans: `c.completion.shrink = True`
 - Integers: `c.messages.timeout = 5000`
 - Dictionaries:
-  * `c.headers.custom['X-Hello'] = 'World'` to override any other values in the
+  * `c.headers.custom = {'X-Hello': 'World'}` to override any other values in the
     dictionary.
   * `c.aliases['foo'] = ':message-info foo'` to add a single value.
 - Lists: