diff --git a/core/designdocument.class.inc.php b/core/designdocument.class.inc.php
index 0a508b687..5b9207a04 100644
--- a/core/designdocument.class.inc.php
+++ b/core/designdocument.class.inc.php
@@ -70,7 +70,7 @@ class DesignDocument extends DOMDocument
 		$this->preserveWhiteSpace = true; // otherwise the formatOutput option would have no effect
 	}
 
-	public function loadXML(string $source, int $options = 0) : bool
+	public function loadXML(string $source, int $options = 0): bool
 	{
 		return parent::loadXML($source, $options | LIBXML_BIGLINES);
 	}