diff --git a/newsletter-bundle/contao/dca/tl_newsletter.php b/newsletter-bundle/contao/dca/tl_newsletter.php
index <HASH>..<HASH> 100644
--- a/newsletter-bundle/contao/dca/tl_newsletter.php
+++ b/newsletter-bundle/contao/dca/tl_newsletter.php
@@ -452,7 +452,7 @@ class tl_newsletter extends Backend
 		if (!strlen($varValue))
 		{
 			$autoAlias = true;
-			$varValue = standardize($this->restoreBasicEntities($dc->activeRecord->subject));
+			$varValue = standardize(String::restoreBasicEntities($dc->activeRecord->subject));
 		}
 
 		$objAlias = $this->Database->prepare("SELECT id FROM tl_newsletter WHERE alias=?")
[Newsletter] Moved `Controller::restoreBasicEntities()` to the `String` class (see #<I>)