diff --git a/core/lib/Drupal/Core/Database/StatementPrefetch.php b/core/lib/Drupal/Core/Database/StatementPrefetch.php
index 18dd582..d775a01 100644
--- a/core/lib/Drupal/Core/Database/StatementPrefetch.php
+++ b/core/lib/Drupal/Core/Database/StatementPrefetch.php
@@ -393,7 +393,7 @@ public function fetchObject($class_name = NULL, $constructor_args = array()) {
       }
       else {
         $this->fetchStyle = PDO::FETCH_CLASS;
-        $this->fetchOptions = array('constructor_args' => $constructor_args);
+        $this->fetchOptions = array('constructor_args' => $constructor_args, 'class' => $class_name);
         // Grab the row in the format specified above.
         $result = $this->current();
         // Reset the fetch parameters to the value stored using setFetchMode().