diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index 3d77f54f0..afce8b60e 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -138,12 +138,13 @@ abstract class Entity extends Location implements Metadatable{
 	const DATA_FLAG_TAMED = 24;
 	const DATA_FLAG_LEASHED = 25;
 	const DATA_FLAG_SHEARED = 26; //for sheep
-	const DATA_FLAG_FALL_FLYING = 27; //???
+	const DATA_FLAG_GLIDING = 27, DATA_FLAG_FALL_FLYING = 27;
 	const DATA_FLAG_ELDER = 28; //elder guardian
 	const DATA_FLAG_MOVING = 29;
 	const DATA_FLAG_BREATHING = 30; //hides bubbles if true
 	const DATA_FLAG_CHESTED = 31; //for mules?
-	const DATA_FLAG_STACKABLE = 32; //???
+	const DATA_FLAG_STACKABLE = 32;
+	const DATA_FLAG_IDLING = 36;
 
 	public static $entityCount = 1;
 	/** @var Entity[] */