diff --git a/core/modules/locale/src/Form/TranslateEditForm.php b/core/modules/locale/src/Form/TranslateEditForm.php
index f8e9938..d953dce 100644
--- a/core/modules/locale/src/Form/TranslateEditForm.php
+++ b/core/modules/locale/src/Form/TranslateEditForm.php
@@ -132,7 +132,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
           }
           if ($plurals == 2) {
             // Simplify user interface text for the most common case.
-            $form['strings'][$string->lid]['translations'][1]['title'] = $this->t('Plural form');
+            $form['strings'][$string->lid]['translations'][1]['#title'] = $this->t('Plural form');
           }
         }
       }
diff --git a/core/modules/views/src/Plugin/views/field/NumericField.php b/core/modules/views/src/Plugin/views/field/NumericField.php
index dbf02d9..2034035 100644
--- a/core/modules/views/src/Plugin/views/field/NumericField.php
+++ b/core/modules/views/src/Plugin/views/field/NumericField.php
@@ -114,9 +114,9 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     }
     if ($plurals == 2) {
       // Simplify user interface text for the most common case.
-      $form['format_plural_values'][0]['description'] = $this->t('Text to use for the singular form, @count will be replaced with the value.');
-      $form['format_plural_values'][1]['title'] = $this->t('Plural form');
-      $form['format_plural_values'][1]['description'] = $this->t('Text to use for the plural form, @count will be replaced with the value.');
+      $form['format_plural_values'][0]['#description'] = $this->t('Text to use for the singular form, @count will be replaced with the value.');
+      $form['format_plural_values'][1]['#title'] = $this->t('Plural form');
+      $form['format_plural_values'][1]['#description'] = $this->t('Text to use for the plural form, @count will be replaced with the value.');
     }
 
     $form['prefix'] = array(