diff --git a/lib/workers/packets.js b/lib/workers/packets.js
index c46c66ba..fd3987c5 100644
--- a/lib/workers/packets.js
+++ b/lib/workers/packets.js
@@ -63,10 +63,22 @@ Packet.id = 0;
 
 Packet.prototype.cmd = -1;
 
+Packet.prototype.getSize = function getSize() {
+  throw new Error('Abstract method.');
+};
+
 Packet.prototype.toWriter = function toWriter() {
   throw new Error('Abstract method.');
 };
 
+Packet.prototype.fromRaw = function fromRaw() {
+  throw new Error('Abstract method.');
+};
+
+Packet.fromRaw = function fromRaw() {
+  throw new Error('Abstract method.');
+};
+
 /**
  * EnvPacket
  * @constructor