diff --git a/src/pocketmine/network/mcpe/protocol/ContainerSetDataPacket.php b/src/pocketmine/network/mcpe/protocol/ContainerSetDataPacket.php
index 825a153d6a3..efe60c7c6cb 100644
--- a/src/pocketmine/network/mcpe/protocol/ContainerSetDataPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/ContainerSetDataPacket.php
@@ -31,18 +31,28 @@
 class ContainerSetDataPacket extends DataPacket{
 	const NETWORK_ID = ProtocolInfo::CONTAINER_SET_DATA_PACKET;
 
-	public $windowid;
+	const PROPERTY_FURNACE_TICK_COUNT = 0;
+	const PROPERTY_FURNACE_LIT_TIME = 1;
+	const PROPERTY_FURNACE_LIT_DURATION = 2;
+	//TODO: check property 3
+	const PROPERTY_FURNACE_FUEL_AUX = 4;
+
+	const PROPERTY_BREWING_STAND_BREW_TIME = 0;
+	const PROPERTY_BREWING_STAND_FUEL_AMOUNT = 1;
+	const PROPERTY_BREWING_STAND_FUEL_TOTAL = 2;
+
+	public $windowId;
 	public $property;
 	public $value;
 
 	protected function decodePayload(){
-		$this->windowid = $this->getByte();
+		$this->windowId = $this->getByte();
 		$this->property = $this->getVarInt();
 		$this->value = $this->getVarInt();
 	}
 
 	protected function encodePayload(){
-		$this->putByte($this->windowid);
+		$this->putByte($this->windowId);
 		$this->putVarInt($this->property);
 		$this->putVarInt($this->value);
 	}
diff --git a/src/pocketmine/tile/Furnace.php b/src/pocketmine/tile/Furnace.php
index 966701a7458..e2559daf045 100644
--- a/src/pocketmine/tile/Furnace.php
+++ b/src/pocketmine/tile/Furnace.php
@@ -265,14 +265,14 @@ public function onUpdate() : bool{
 			$windowId = $player->getWindowId($this->getInventory());
 			if($windowId > 0){
 				$pk = new ContainerSetDataPacket();
-				$pk->windowid = $windowId;
-				$pk->property = 0; //Smelting
+				$pk->windowId = $windowId;
+				$pk->property = ContainerSetDataPacket::PROPERTY_FURNACE_TICK_COUNT; //Smelting
 				$pk->value = $this->namedtag->CookTime->getValue();
 				$player->dataPacket($pk);
 
 				$pk = new ContainerSetDataPacket();
-				$pk->windowid = $windowId;
-				$pk->property = 1; //Fire icon
+				$pk->windowId = $windowId;
+				$pk->property = ContainerSetDataPacket::PROPERTY_FURNACE_LIT_TIME;
 				$pk->value = $this->namedtag->BurnTicks->getValue();
 				$player->dataPacket($pk);
 			}