diff --git a/forge-game/src/main/java/forge/trackable/TrackableObject.java b/forge-game/src/main/java/forge/trackable/TrackableObject.java
index 895a715294e..e654d9938fd 100644
--- a/forge-game/src/main/java/forge/trackable/TrackableObject.java
+++ b/forge-game/src/main/java/forge/trackable/TrackableObject.java
@@ -14,7 +14,7 @@ public abstract class TrackableObject implements IIdentifiable, Serializable {
     private static final long serialVersionUID = 7386836745378571056L;
 
     private final int id;
-    protected final transient Tracker tracker;
+    protected transient Tracker tracker;
     private final Map<TrackableProperty, Object> props;
     private final Set<TrackableProperty> changedProps;
     private boolean copyingProps;
@@ -30,6 +30,11 @@ public abstract class TrackableObject implements IIdentifiable, Serializable {
         return id;
     }
 
+    // needed for multiplayer support
+    public void setTracker(Tracker tracker) {
+        this.tracker = tracker;
+    }
+
     public final Tracker getTracker() {
         return tracker;
     }