diff --git a/phpBB/adm/style/acp_forums.html b/phpBB/adm/style/acp_forums.html
index 756092a1f0..0d8b8ad583 100644
--- a/phpBB/adm/style/acp_forums.html
+++ b/phpBB/adm/style/acp_forums.html
@@ -343,6 +343,8 @@
 		<!-- EVENT acp_forums_rules_settings_append -->
 		</fieldset>
 	</div>
+	
+	<!-- EVENT acp_forums_custom_settings -->
 
 	<fieldset class="submit-buttons">
 		<legend>{L_SUBMIT}</legend>
diff --git a/phpBB/docs/events.md b/phpBB/docs/events.md
index 19e7d1121c..22aac983b0 100644
--- a/phpBB/docs/events.md
+++ b/phpBB/docs/events.md
@@ -22,6 +22,12 @@ acp_email_options_after
 * Since: 3.1.2-RC1
 * Purpose: Add settings to mass email form
 
+acp_forums_custom_settings
+===
+* Location: adm/style/acp_forums.html
+* Since: 3.1.6-RC1
+* Purpose: Add its own box (fieldset) for extension settings
+
 acp_forums_main_settings_append
 ===
 * Location: adm/style/acp_forums.html