diff --git a/src/pocketmine/level/format/io/region/RegionLoader.php b/src/pocketmine/level/format/io/region/RegionLoader.php
index 0ed80516d..6fbe462dd 100644
--- a/src/pocketmine/level/format/io/region/RegionLoader.php
+++ b/src/pocketmine/level/format/io/region/RegionLoader.php
@@ -53,6 +53,7 @@ use function substr;
 use function time;
 use function touch;
 use function unpack;
+use const SORT_NUMERIC;
 use const STR_PAD_RIGHT;
 
 class RegionLoader{