diff --git a/phpBB/phpbb/template/twig/extension/forms.php b/phpBB/phpbb/template/twig/extension/forms.php
index 5a3d9420db..b146aacfb9 100644
--- a/phpBB/phpbb/template/twig/extension/forms.php
+++ b/phpBB/phpbb/template/twig/extension/forms.php
@@ -183,6 +183,7 @@ class forms extends AbstractExtension
 				'GROUP_ONLY'	=> (bool) ($form_data['group_only'] ?? false),
 				'SIZE'			=> (int) ($form_data['size'] ?? 0),
 				'MULTIPLE'		=> (bool) ($form_data['multiple'] ?? false),
+				'ONCHANGE'		=> (string) ($form_data['onchange'] ?? ''),
 			]);
 		}
 		catch (\Twig\Error\Error $e)
diff --git a/phpBB/styles/all/template/macros/forms/select.twig b/phpBB/styles/all/template/macros/forms/select.twig
index 827ccb1121..1ada063e57 100644
--- a/phpBB/styles/all/template/macros/forms/select.twig
+++ b/phpBB/styles/all/template/macros/forms/select.twig
@@ -8,6 +8,7 @@
 		name="{{ NAME }}"
 		{% if TOGGLEABLE %}data-togglable-settings="true"{% endif %}
 		{% if MULTIPLE %}multiple="multiple"{% endif %}
+		{% if ONCHANGE %}onchange="{{ ONCHANGE }}"{% endif %}
 		{% if SIZE %}size="{{ SIZE }}"{% endif %}>
 {% for element in OPTIONS %}
 	{% if not GROUP_ONLY and element.options %}