diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index c0f98ef303..65a28d39cd 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -206,7 +206,7 @@ abstract class Entity extends Location implements Metadatable{
 	const DATA_FLAG_LINGER = 44;
 	const DATA_FLAG_HAS_COLLISION = 45;
 	const DATA_FLAG_AFFECTED_BY_GRAVITY = 46;
-
+	const DATA_FLAG_FIRE_IMMUNE = 47;
 	const DATA_FLAG_DANCING = 48;
 
 	public static $entityCount = 1;