--- a/net/minecraft/network/login/client/CPacketCustomPayloadLogin.java
+++ b/net/minecraft/network/login/client/CPacketCustomPayloadLogin.java
@@ -8,7 +8,7 @@
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
 
-public class CPacketCustomPayloadLogin implements Packet<INetHandlerLoginServer> {
+public class CPacketCustomPayloadLogin implements Packet<INetHandlerLoginServer>, net.minecraftforge.fml.network.ICustomPacket<CPacketCustomPayloadLogin> {
    private int field_209922_a;
    private PacketBuffer field_209923_b;