diff --git a/src/utils/RegistryTrait.php b/src/utils/RegistryTrait.php
index 9662b71ad..82066c9c3 100644
--- a/src/utils/RegistryTrait.php
+++ b/src/utils/RegistryTrait.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\utils;
 
 use function array_map;
+use function assert;
 use function count;
 use function get_class;
 use function mb_strtoupper;