--- a/net/minecraft/client/network/NetHandlerPlayClient.java
+++ b/net/minecraft/client/network/NetHandlerPlayClient.java
@@ -1615,6 +1615,7 @@
             ((DebugRendererWorldGenAttempts)this.client.debugRenderer.field_201750_j).func_201734_a(packetbuffer.readBlockPos(), packetbuffer.readFloat(), packetbuffer.readFloat(), packetbuffer.readFloat(), packetbuffer.readFloat(), packetbuffer.readFloat());
             LOGGER.warn("Unknown custom packed identifier: {}", (Object)resourcelocation);
          } else {
+            if (!net.minecraftforge.fml.network.NetworkHooks.onCustomPayload(packetIn, this.netManager))
             LOGGER.warn("Unknown custom packed identifier: {}", (Object)resourcelocation);
          }
       } finally {