--- a/net/minecraft/network/play/client/CPacketCustomPayload.java
+++ b/net/minecraft/network/play/client/CPacketCustomPayload.java
@@ -9,7 +9,8 @@
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
 
-public class CPacketCustomPayload implements Packet<INetHandlerPlayServer> {
+public class CPacketCustomPayload implements Packet<INetHandlerPlayServer>, net.minecraftforge.fml.network.ICustomPacket<CPacketCustomPayload>
+{
    public static final ResourceLocation field_210344_a = new ResourceLocation("minecraft:brand");
    private ResourceLocation field_149562_a;
    private PacketBuffer field_149561_c;