diff --git a/core/lib/Drupal/Core/Database/Query/SelectInterface.php b/core/lib/Drupal/Core/Database/Query/SelectInterface.php
index 6b87014..1a30f22 100644
--- a/core/lib/Drupal/Core/Database/Query/SelectInterface.php
+++ b/core/lib/Drupal/Core/Database/Query/SelectInterface.php
@@ -147,10 +147,13 @@ public function escapeLike($string);
    * For some database drivers, it may also wrap the field name in
    * database-specific escape characters.
    *
+   * @param string $field
+   *   An unsanitized field name.
+   *
    * @return
    *   The sanitized field name string.
    */
-  public function escapeField($string);
+  public function escapeField($field);
 
   /**
    * Compiles and returns an associative array of the arguments for this prepared statement.