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 3f7c8bd..2b32665 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
@@ -183,7 +183,7 @@ function set_count_field($table, $field, $alias = NULL) {
    * Set the table header; used for click-sorting because it's needed
    * info to modify the ORDER BY clause.
    */
-  function set_header($header) {
+  function setHeader($header) {
     $this->header = $header;
   }