diff --git a/src/pocketmine/network/mcpe/protocol/DataPacket.php b/src/pocketmine/network/mcpe/protocol/DataPacket.php
index 849739417..3c1ae71f1 100644
--- a/src/pocketmine/network/mcpe/protocol/DataPacket.php
+++ b/src/pocketmine/network/mcpe/protocol/DataPacket.php
@@ -136,10 +136,10 @@ abstract class DataPacket extends NetworkBinaryStream{
 	}
 
 	public function __get($name){
-		throw new \Error("Cannot read non-existing field \"$name\"");
+		throw new \Error("Undefined property: " . get_class($this) . "::\$" . $name);
 	}
 
 	public function __set($name, $value){
-		throw new \Error("Cannot write non-existing field \"$name\"");
+		throw new \Error("Undefined property: " . get_class($this) . "::\$" . $name);
 	}
 }