diff --git a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
index 690ec6d..46b8eb9 100644
--- a/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
+++ b/core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php
@@ -253,6 +253,9 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
     if (!$form_state->get('exposed')) {
       // Retain the helper option
       $this->helper->buildOptionsForm($form, $form_state);
+
+      // Show help text if not exposed to end users.
+      $form['value']['#description'] = t('Leave blank for all. Otherwise, the first selected term will be the default instead of "Any".');
     }
   }