diff --git a/src/pocketmine/network/protocol/PlayerFallPacket.php b/src/pocketmine/network/protocol/PlayerFallPacket.php
index f6febd251..91333e6c9 100644
--- a/src/pocketmine/network/protocol/PlayerFallPacket.php
+++ b/src/pocketmine/network/protocol/PlayerFallPacket.php
@@ -27,10 +27,10 @@ namespace pocketmine\network\protocol;
 class PlayerFallPacket extends DataPacket{
 	const NETWORK_ID = Info::PLAYER_FALL_PACKET;
 
-	public $unknown; //betting this is fall distance, but let's make sure first
+	public $fallDistance;
 
 	public function decode(){
-		$this->unknown = $this->getLFloat();
+		$this->fallDistance = $this->getLFloat();
 	}
 
 	public function encode(){