diff --git a/src/Util/JsonLD.php b/src/Util/JsonLD.php
index b4ff53fdb0..878cd71e6a 100644
--- a/src/Util/JsonLD.php
+++ b/src/Util/JsonLD.php
@@ -173,7 +173,7 @@ class JsonLD
 	 *
 	 * @return array fetched element
 	 */
-	public static function fetchElementArray($array, $element, $key = '@id')
+	public static function fetchElementArray($array, $element, $key = null)
 	{
 		if (empty($array)) {
 			return null;
@@ -191,12 +191,10 @@ class JsonLD
 		$elements = [];
 
 		foreach ($array[$element] as $entry) {
-			if (!is_array($entry)) {
+			if (!is_array($entry) || (is_null($key) && is_array($entry))) {
 				$elements[] = $entry;
-			} elseif (isset($entry[$key])) {
+			} elseif (!is_null($key) && isset($entry[$key])) {
 				$elements[] = $entry[$key];
-			} elseif (!empty($entry) || !is_array($entry)) {
-				$elements[] = $entry;
 			}
 		}