diff --git a/core/modules/views/lib/Drupal/views/ManyToOneHelper.php b/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
index 895eab75ba30..ed60500fac01 100644
--- a/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
+++ b/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
@@ -86,7 +86,7 @@ class ManyToOneHelper {
     }
 
     // Cycle through the joins. This isn't as error-safe as the normal
-    // ensure_path logic. Perhaps it should be.
+    // ensurePath logic. Perhaps it should be.
     $r_join = clone $join;
     while ($r_join->leftTable != $base_table) {
       $r_join = HandlerBase::getTableJoin($r_join->leftTable, $base_table);
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
index 5c2e8a51ba8d..7555ff47f471 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
@@ -365,7 +365,7 @@ class Sql extends QueryPluginBase {
    *   added.
    */
   public function addTable($table, $relationship = NULL, JoinPluginBase $join = NULL, $alias = NULL) {
-    if (!$this->ensure_path($table, $relationship, $join)) {
+    if (!$this->ensurePath($table, $relationship, $join)) {
       return FALSE;
     }
 
@@ -545,7 +545,7 @@ class Sql extends QueryPluginBase {
     // join to a link point, not the base table.
     $join = $this->adjust_join($join, $relationship);
 
-    if ($this->ensure_path($table, $relationship, $join)) {
+    if ($this->ensurePath($table, $relationship, $join)) {
       // Attempt to eliminate redundant joins.  If this table's
       // relationship and join exactly matches an existing table's
       // relationship and join, we do not have to join to it again;
@@ -587,7 +587,7 @@ class Sql extends QueryPluginBase {
    * query they will be added, but additional copies will NOT be added
    * if the table is already there.
    */
-  function ensure_path($table, $relationship = NULL, $join = NULL, $traced = array(), $add = array()) {
+  protected function ensurePath($table, $relationship = NULL, $join = NULL, $traced = array(), $add = array()) {
     if (!isset($relationship)) {
       $relationship = $this->view->storage->get('base_table');
     }
@@ -632,7 +632,7 @@ class Sql extends QueryPluginBase {
 
     // Keep looking.
     $traced[$join->leftTable] = TRUE;
-    return $this->ensure_path($join->leftTable, $relationship, $left_join, $traced, $add);
+    return $this->ensurePath($join->leftTable, $relationship, $left_join, $traced, $add);
   }
 
   /**