diff --git a/Barotrauma/BarotraumaClient/ClientSource/LuaCs/LuaCsNetworking.cs b/Barotrauma/BarotraumaClient/ClientSource/LuaCs/LuaCsNetworking.cs
index 9bf1fc251..248f5d64a 100644
--- a/Barotrauma/BarotraumaClient/ClientSource/LuaCs/LuaCsNetworking.cs
+++ b/Barotrauma/BarotraumaClient/ClientSource/LuaCs/LuaCsNetworking.cs
@@ -9,6 +9,8 @@ namespace Barotrauma
 
         public void SendSyncMessage()
         {
+            if (GameMain.Client == null) { return; }
+
             WriteOnlyMessage message = new WriteOnlyMessage();
             message.WriteByte((byte)ClientPacketHeader.LUA_NET_MESSAGE);
             message.WriteByte((byte)LuaCsClientToServer.RequestAllIds);