diff --git a/fml/client/net/minecraft/src/BaseMod.java b/fml/client/net/minecraft/src/BaseMod.java
index 41c3cff503..3755c9036d 100644
--- a/fml/client/net/minecraft/src/BaseMod.java
+++ b/fml/client/net/minecraft/src/BaseMod.java
@@ -448,6 +448,7 @@ public abstract class BaseMod implements cpw.mods.fml.common.modloader.BaseModPr
         return null;
     }
 
+    @SideOnly(CLIENT)
     public void clientCustomPayload(NetClientHandler handler, Packet250CustomPayload packet)
     {