diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Combine.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Combine.php
index e0f8cf4..0a299b6 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Combine.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Combine.php
@@ -126,7 +126,7 @@ function op_not($expression) {
     $this->query->add_where_expression($this->options['group'], "$expression NOT LIKE $placeholder", array($placeholder => '%' . db_like($this->value) . '%'));
   }
 
-  public function opRegex($expression) {
+  protected function opRegex($expression) {
     $placeholder = $this->placeholder();
     $this->query->add_where_expression($this->options['group'], "$expression RLIKE $placeholder", array($placeholder => $this->value));
   }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
index 168b324..2c39ccb 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php
@@ -275,7 +275,7 @@ function op_empty($field) {
     $this->query->add_where($this->options['group'], $field, NULL, $operator);
   }
 
-  public function opRegex($field) {
+  protected function opRegex($field) {
     $this->query->add_where($this->options['group'], $field, $this->value, 'RLIKE');
   }
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
index 55c8d0c..1f7f9a4 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
@@ -331,7 +331,7 @@ function op_longer($field) {
     $this->query->add_where_expression($this->options['group'], "LENGTH($field) > $placeholder", array($placeholder => $this->value));
   }
 
-  public function opRegex($field) {
+  protected function opRegex($field) {
     $this->query->add_where($this->options['group'], $field, $this->value, 'RLIKE');
   }