diff --git a/src/network/mcpe/NetworkSession.php b/src/network/mcpe/NetworkSession.php
index cbeab346a..9682b1f02 100644
--- a/src/network/mcpe/NetworkSession.php
+++ b/src/network/mcpe/NetworkSession.php
@@ -129,7 +129,9 @@ use function base64_encode;
 use function bin2hex;
 use function count;
 use function get_class;
+use function hrtime;
 use function in_array;
+use function intdiv;
 use function json_encode;
 use function ksort;
 use function min;