diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/filter/TaxonomyIndexTid.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/filter/TaxonomyIndexTid.php
index f485ac6..2a704be 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/filter/TaxonomyIndexTid.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/filter/TaxonomyIndexTid.php
@@ -211,7 +211,7 @@ function value_form(&$form, &$form_state) {
     }
   }
 
-  function value_validate($form, &$form_state) {
+  public function valueValidate($form, &$form_state) {
     // We only validate if they've chosen the text field style.
     if ($this->options['type'] != 'textfield') {
       return;
diff --git a/core/modules/user/lib/Drupal/user/Plugin/views/filter/Name.php b/core/modules/user/lib/Drupal/user/Plugin/views/filter/Name.php
index 8c5104c..b0b6ed6 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/views/filter/Name.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/views/filter/Name.php
@@ -50,7 +50,7 @@ function value_form(&$form, &$form_state) {
     }
   }
 
-  function value_validate($form, &$form_state) {
+  public function valueValidate($form, &$form_state) {
     $values = drupal_explode_tags($form_state['values']['options']['value']);
     $uids = $this->validate_user_strings($form['value'], $values);
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
index e5327f1..baae564 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/BooleanOperator.php
@@ -135,7 +135,7 @@ function value_form(&$form, &$form_state) {
     }
   }
 
-  function value_validate($form, &$form_state) {
+  public function valueValidate($form, &$form_state) {
     if ($form_state['values']['options']['value'] == 'All' && !empty($form_state['values']['options']['expose']['required'])) {
       form_set_error('value', t('You must select a value unless this is an non-required exposed filter.'));
     }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
index e0dd2d5..ac1d00c 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
@@ -235,7 +235,7 @@ public function buildOptionsForm(&$form, &$form_state) {
    */
   public function validateOptionsForm(&$form, &$form_state) {
     $this->operator_validate($form, $form_state);
-    $this->value_validate($form, $form_state);
+    $this->valueValidate($form, $form_state);
     if (!empty($this->options['exposed']) && !$this->isAGroup()) {
       $this->validateExposeForm($form, $form_state);
     }
@@ -332,7 +332,7 @@ function value_form(&$form, &$form_state) { $form['value'] = array(); }
   /**
    * Validate the options form.
    */
-  function value_validate($form, &$form_state) { }
+  public function valueValidate($form, &$form_state) { }
 
   /**
    * Perform any necessary changes to the form values prior to storage.