diff --git a/request/User/UserHistoryRequest.php b/request/User/UserHistoryRequest.php
index 7d1fc8f..c5f3ea6 100644
--- a/request/User/UserHistoryRequest.php
+++ b/request/User/UserHistoryRequest.php
@@ -36,7 +36,7 @@ public function __construct(string $username, $type = '') // "" means empty stri
         $this->username = $username;
 
         if (null !== $type) {
-            if (!\in_array($type, ['anime', 'manga'])) {
+            if (!empty($type) && !\in_array($type, ['anime', 'manga'])) {
                 throw new \InvalidArgumentException(sprintf('Type %s is not valid', $type));
             }