--- ../src-base/minecraft/net/minecraft/server/network/NetHandlerHandshakeTCP.java
+++ ../src-work/minecraft/net/minecraft/server/network/NetHandlerHandshakeTCP.java
@@ -23,6 +23,8 @@
 
     public void func_147383_a(C00Handshake p_147383_1_)
     {
+        if (!net.minecraftforge.fml.common.FMLCommonHandler.instance().handleServerHandshake(p_147383_1_, this.field_147386_b)) return;
+
         switch (NetHandlerHandshakeTCP.SwitchEnumConnectionState.field_151291_a[p_147383_1_.func_149594_c().ordinal()])
         {
             case 1:
