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-rw-r--r--modules/system/system.admin.inc1
1 files changed, 1 insertions, 0 deletions
diff --git a/modules/system/system.admin.inc b/modules/system/system.admin.inc
index 5ec6d5f42..52d425d5a 100644
--- a/modules/system/system.admin.inc
+++ b/modules/system/system.admin.inc
@@ -2781,6 +2781,7 @@ function system_configure_date_formats_form($form, &$form_state, $dfid = 0) {
'#attached' => array(
'js' => array(drupal_get_path('module', 'system') . '/system.js', $js_settings),
),
+ '#required' => TRUE,
);
$form['actions'] = array('#type' => 'actions');