diff --git a/src/utils/Config.php b/src/utils/Config.php
index e611d1f03..6923db588 100644
--- a/src/utils/Config.php
+++ b/src/utils/Config.php
@@ -25,6 +25,7 @@ namespace pocketmine\utils;
 
 use Webmozart\PathUtil\Path;
 use function array_change_key_case;
+use function array_fill_keys;
 use function array_keys;
 use function array_shift;
 use function count;