diff --git a/core/designdocument.class.inc.php b/core/designdocument.class.inc.php
index 2befa6b8f..ab7028583 100644
--- a/core/designdocument.class.inc.php
+++ b/core/designdocument.class.inc.php
@@ -70,13 +70,7 @@ class DesignDocument extends DOMDocument
 		$this->preserveWhiteSpace = true; // otherwise the formatOutput option would have no effect
 	}
 
-	/**
-	 * @param string $source
-	 * @param int $options
-	 *
-	 * @return bool|\DOMDocument
-	 */
-	public function loadXML(string $source, int $options = 0): bool|DOMDocument
+	public function loadXML(string $source, int $options = 0): bool
 	{
 		return parent::loadXML($source, $options | LIBXML_BIGLINES);
 	}