diff --git a/src/pocketmine/network/mcpe/protocol/PlayerActionPacket.php b/src/pocketmine/network/mcpe/protocol/PlayerActionPacket.php
index c8d916de1..41ca09c13 100644
--- a/src/pocketmine/network/mcpe/protocol/PlayerActionPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/PlayerActionPacket.php
@@ -48,7 +48,7 @@ class PlayerActionPacket extends DataPacket{
 
 	const ACTION_START_GLIDE = 15;
 	const ACTION_STOP_GLIDE = 16;
-
+	const ACTION_BUILD_DENIED = 17;
 	const ACTION_CONTINUE_BREAK = 18;
 
 	public $entityRuntimeId;