diff --git a/src/pocketmine/network/mcpe/RakLibInterface.php b/src/pocketmine/network/mcpe/RakLibInterface.php
index 8045f36b1..e113174b8 100644
--- a/src/pocketmine/network/mcpe/RakLibInterface.php
+++ b/src/pocketmine/network/mcpe/RakLibInterface.php
@@ -200,6 +200,7 @@ class RakLibInterface implements ServerInstance, AdvancedSourceInterface{
 			$pk = null;
 			if(!$packet->isEncoded){
 				$packet->encode();
+				$packet->isEncoded = true;
 			}elseif(!$needACK){
 				if(!isset($packet->__encapsulatedPacket)){
 					$packet->__encapsulatedPacket = new CachedEncapsulatedPacket;