diff --git a/develop/usage/configuration/config_documentation.html b/develop/usage/configuration/config_documentation.html

index db3eb61119..8b104f3403 100644
--- a/develop/usage/configuration/config_documentation.html
+++ b/develop/usage/configuration/config_documentation.html
@@ -1691,7 +1691,7 @@ blacklisted.</p>
 <pre><code class="language-yaml">max_spider_size: 8M
 </code></pre>
 <hr />
-<h3 id="url_preview_language"><a class="header" href="#url_preview_language"><code>url_preview_language</code></a></h3>
+<h3 id="url_preview_accept_language"><a class="header" href="#url_preview_accept_language"><code>url_preview_accept_language</code></a></h3>
 <p>A list of values for the Accept-Language HTTP header used when
 downloading webpages during URL preview generation. This allows
 Synapse to specify the preferred languages that URL previews should