diff --git a/logic/Preparation/Interface/IGameObj.cs b/logic/Preparation/Interface/IGameObj.cs
index a32a1c5..6c5205b 100644
--- a/logic/Preparation/Interface/IGameObj.cs
+++ b/logic/Preparation/Interface/IGameObj.cs
@@ -4,7 +4,7 @@ namespace Preparation.Interface
 {
     public interface IGameObj
     {
-        public GameObjType Type { get; set; }
+        public GameObjType Type { get; }
         public long ID { get; }
         public XYPosition Position { get; }  // if Square, Pos equals the center
         public double FacingDirection { get; }