diff --git a/src/Reader/JsonLdReader.php b/src/Reader/JsonLdReader.php
index e0e42ef..46591f0 100644
--- a/src/Reader/JsonLdReader.php
+++ b/src/Reader/JsonLdReader.php
@@ -150,7 +150,7 @@ private function readItem(stdClass $item, string $url, ?string $vocabulary) : It
             } elseif (is_array($type)) {
                 $types = array_map(function($type) use ($vocabulary) {
                     return is_string($type) ? $this->resolveTerm($type, $vocabulary) : null;
-                }, $types);
+                }, $type);
 
                 $types = array_filter($types);
                 $types = array_values($types);