diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index b89dc8ec0..9fdcefbb6 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -1559,7 +1559,7 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 
 			$this->move($dx, $dy, $dz);
 
-			$diff = $this->subtract($newPos)->lengthSquared() / $tickDiff ** 2;
+			$diff = $this->distanceSquared($newPos) / $tickDiff ** 2;
 
 			if($this->isSurvival() and !$revert and $diff > 0.0625){
 				$ev = new PlayerIllegalMoveEvent($this, $newPos, new Vector3($this->lastX, $this->lastY, $this->lastZ));