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 bdf71f4..f75b0ad 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
@@ -96,7 +96,7 @@ function opEqual($expression) {
     $this->query->add_where_expression($this->options['group'], "$expression $operator $placeholder", array($placeholder => $this->value));
   }
 
-  function op_contains($expression) {
+  public function opContains($expression) {
     $placeholder = $this->placeholder();
     $this->query->add_where_expression($this->options['group'], "$expression LIKE $placeholder", array($placeholder => '%' . db_like($this->value) . '%'));
   }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
index c71e14b..8a32d39 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/String.php
@@ -53,7 +53,7 @@ function operators() {
       'contains' => array(
         'title' => t('Contains'),
         'short' => t('contains'),
-        'method' => 'op_contains',
+        'method' => 'opContains',
         'values' => 1,
       ),
       'word' => array(
@@ -264,7 +264,7 @@ public function opEqual($field) {
     $this->query->add_where($this->options['group'], $field, $this->value, $this->operator());
   }
 
-  function op_contains($field) {
+  public function opContains($field) {
     $this->query->add_where($this->options['group'], $field, '%' . db_like($this->value) . '%', 'LIKE');
   }