diff --git a/.make/release/update.classes.inc.php b/.make/release/update.classes.inc.php
index 8f1499439..5b67edad3 100644
--- a/.make/release/update.classes.inc.php
+++ b/.make/release/update.classes.inc.php
@@ -199,7 +199,7 @@ class DatamodelsXmlFiles extends AbstractGlobFileVersionUpdater
 		libxml_clear_errors();
 		$oFileXml->formatOutput = true;
 		$oFileXml->preserveWhiteSpace = false;
-		$oFileXml->loadXML($sFileContent);
+		$oFileXml->loadXML($sFileContent, LIBXML_BIGLINES);
 
 		$oFileItopFormat = new iTopDesignFormat($oFileXml);
 
diff --git a/core/designdocument.class.inc.php b/core/designdocument.class.inc.php
index 3965c68ec..c4a1e8e34 100644
--- a/core/designdocument.class.inc.php
+++ b/core/designdocument.class.inc.php
@@ -71,6 +71,11 @@ class DesignDocument extends DOMDocument
 		$this->preserveWhiteSpace = true; // otherwise the formatOutput option would have no effect
 	}
 
+	public function loadXML(string $source, int $options = 0)
+	{
+		parent::loadXML($source, $options | LIBXML_BIGLINES);
+	}
+
 	/**
 	 * Overload of the standard API
 	 *